Finding the Fourth Proportional to 99,644, 137,508.72 and 54,932.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,644 : 137,508.72 = 54,932.96 : x
2. Step 2: Convert to fraction form
   99,644/137,508.72 = 54,932.96/x
3. Step 3: Cross multiply
   99,644x = 137,508.72 × 54,932.96
4. Step 4: Simplify right side
   99,644x = 7,553,761,015.41
5. Step 5: Solve for x
   x = 7,553,761,015.41/99,644
6. Step 6: Final answer
   x = 75,807.48