Finding the Fourth Proportional to 39,870,729, 55,021,627.98 and 21,536,014.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,870,729 : 55,021,627.98 = 21,536,014.50 : x
2. Step 2: Convert to fraction form
   39,870,729/55,021,627.98 = 21,536,014.50/x
3. Step 3: Cross multiply
   39,870,729x = 55,021,627.98 × 21,536,014.50
4. Step 4: Simplify right side
   39,870,729x = 1,184,946,577,990,885.75
5. Step 5: Solve for x
   x = 1,184,946,577,990,885.75/39,870,729
6. Step 6: Final answer
   x = 29,719,711.87