Finding the Fourth Proportional to 90,340.72, 124,772.52 and 61,611.28

Step by Step Solution

1. Step 1: Write the proportion equation
   90,340.72 : 124,772.52 = 61,611.28 : x
2. Step 2: Convert to fraction form
   90,340.72/124,772.52 = 61,611.28/x
3. Step 3: Cross multiply
   90,340.72x = 124,772.52 × 61,611.28
4. Step 4: Simplify right side
   90,340.72x = 7,687,394,666.03
5. Step 5: Solve for x
   x = 7,687,394,666.03/90,340.72
6. Step 6: Final answer
   x = 85,093.35