Finding the Fourth Proportional to 85,669.50, 128,351.61 and 73,061.61

Step by Step Solution

1. Step 1: Write the proportion equation
   85,669.50 : 128,351.61 = 73,061.61 : x
2. Step 2: Convert to fraction form
   85,669.50/128,351.61 = 73,061.61/x
3. Step 3: Cross multiply
   85,669.50x = 128,351.61 × 73,061.61
4. Step 4: Simplify right side
   85,669.50x = 9,377,575,272.69
5. Step 5: Solve for x
   x = 9,377,575,272.69/85,669.50
6. Step 6: Final answer
   x = 109,462.24