Finding the Fourth Proportional to 261,916,493.34, 392,766,647.49 and 89,407,201.80

Step by Step Solution

1. Step 1: Write the proportion equation
   261,916,493.34 : 392,766,647.49 = 89,407,201.80 : x
2. Step 2: Convert to fraction form
   261,916,493.34/392,766,647.49 = 89,407,201.80/x
3. Step 3: Cross multiply
   261,916,493.34x = 392,766,647.49 × 89,407,201.80
4. Step 4: Simplify right side
   261,916,493.34x = 35,116,166,912,447,892
5. Step 5: Solve for x
   x = 35,116,166,912,447,892/261,916,493.34
6. Step 6: Final answer
   x = 134,073,904.49