Finding the Fourth Proportional to 99,592.32, 137,429.28 and 54,880.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,592.32 : 137,429.28 = 54,880.32 : x
2. Step 2: Convert to fraction form
   99,592.32/137,429.28 = 54,880.32/x
3. Step 3: Cross multiply
   99,592.32x = 137,429.28 × 54,880.32
4. Step 4: Simplify right side
   99,592.32x = 7,542,162,863.77
5. Step 5: Solve for x
   x = 7,542,162,863.77/99,592.32
6. Step 6: Final answer
   x = 75,730.37