Finding the Fourth Proportional to 9,870,946,290.15, 13,621,905,880.49 and 5,641,948,980.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870,946,290.15 : 13,621,905,880.49 = 5,641,948,980.42 : x
2. Step 2: Convert to fraction form
   9,870,946,290.15/13,621,905,880.49 = 5,641,948,980.42/x
3. Step 3: Cross multiply
   9,870,946,290.15x = 13,621,905,880.49 × 5,641,948,980.42
4. Step 4: Simplify right side
   9,870,946,290.15x = 76,854,097,993,741,795,328
5. Step 5: Solve for x
   x = 76,854,097,993,741,795,328/9,870,946,290.15
6. Step 6: Final answer
   x = 7,785,889,593.02