Finding the Fourth Proportional to 99,616.32, 137,470.56 and 54,904.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,616.32 : 137,470.56 = 54,904.32 : x
2. Step 2: Convert to fraction form
   99,616.32/137,470.56 = 54,904.32/x
3. Step 3: Cross multiply
   99,616.32x = 137,470.56 × 54,904.32
4. Step 4: Simplify right side
   99,616.32x = 7,547,727,616.82
5. Step 5: Solve for x
   x = 7,547,727,616.82/99,616.32
6. Step 6: Final answer
   x = 75,767.98