Finding the Fourth Proportional to 99,404.99, 136,989.92 and 71,061.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,404.99 : 136,989.92 = 71,061.47 : x
2. Step 2: Convert to fraction form
   99,404.99/136,989.92 = 71,061.47/x
3. Step 3: Cross multiply
   99,404.99x = 136,989.92 × 71,061.47
4. Step 4: Simplify right side
   99,404.99x = 9,734,705,090.38
5. Step 5: Solve for x
   x = 9,734,705,090.38/99,404.99
6. Step 6: Final answer
   x = 97,929.74