Finding the Fourth Proportional to 78,491,300.01, 117,727,966.37 and 20,988,055.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,491,300.01 : 117,727,966.37 = 20,988,055.21 : x
2. Step 2: Convert to fraction form
   78,491,300.01/117,727,966.37 = 20,988,055.21/x
3. Step 3: Cross multiply
   78,491,300.01x = 117,727,966.37 × 20,988,055.21
4. Step 4: Simplify right side
   78,491,300.01x = 2,470,881,057,934,583.50
5. Step 5: Solve for x
   x = 2,470,881,057,934,583.50/78,491,300.01
6. Step 6: Final answer
   x = 31,479,680.65