Finding the Fourth Proportional to 99,889.72, 137,841.72 and 54,558.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,889.72 : 137,841.72 = 54,558.52 : x
2. Step 2: Convert to fraction form
   99,889.72/137,841.72 = 54,558.52/x
3. Step 3: Cross multiply
   99,889.72x = 137,841.72 × 54,558.52
4. Step 4: Simplify right side
   99,889.72x = 7,520,440,237.45
5. Step 5: Solve for x
   x = 7,520,440,237.45/99,889.72
6. Step 6: Final answer
   x = 75,287.43