Finding the Fourth Proportional to 99,877.98, 137,830.23 and 54,555.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,877.98 : 137,830.23 = 54,555.42 : x
2. Step 2: Convert to fraction form
   99,877.98/137,830.23 = 54,555.42/x
3. Step 3: Cross multiply
   99,877.98x = 137,830.23 × 54,555.42
4. Step 4: Simplify right side
   99,877.98x = 7,519,386,086.35
5. Step 5: Solve for x
   x = 7,519,386,086.35/99,877.98
6. Step 6: Final answer
   x = 75,285.72