Finding the Fourth Proportional to 99,772.32, 137,685.52 and 55,060

Step by Step Solution

1. Step 1: Write the proportion equation
   99,772.32 : 137,685.52 = 55,060 : x
2. Step 2: Convert to fraction form
   99,772.32/137,685.52 = 55,060/x
3. Step 3: Cross multiply
   99,772.32x = 137,685.52 × 55,060
4. Step 4: Simplify right side
   99,772.32x = 7,580,964,731.20
5. Step 5: Solve for x
   x = 7,580,964,731.20/99,772.32
6. Step 6: Final answer
   x = 75,982.64