Finding the Fourth Proportional to 9,920,836.98, 13,689,694.71 and 5,570,401.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920,836.98 : 13,689,694.71 = 5,570,401.50 : x
2. Step 2: Convert to fraction form
   9,920,836.98/13,689,694.71 = 5,570,401.50/x
3. Step 3: Cross multiply
   9,920,836.98x = 13,689,694.71 × 5,570,401.50
4. Step 4: Simplify right side
   9,920,836.98x = 76,257,095,947,126.06
5. Step 5: Solve for x
   x = 76,257,095,947,126.06/9,920,836.98
6. Step 6: Final answer
   x = 7,686,558.71