Finding the Fourth Proportional to 99,554.69, 137,385.42 and 54,842.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99,554.69 : 137,385.42 = 54,842.69 : x
2. Step 2: Convert to fraction form
   99,554.69/137,385.42 = 54,842.69/x
3. Step 3: Cross multiply
   99,554.69x = 137,385.42 × 54,842.69
4. Step 4: Simplify right side
   99,554.69x = 7,534,586,137.38
5. Step 5: Solve for x
   x = 7,534,586,137.38/99,554.69
6. Step 6: Final answer
   x = 75,682.88