Finding the Fourth Proportional to 99,488.96, 137,293.94 and 54,166.85

Step by Step Solution

1. Step 1: Write the proportion equation
   99,488.96 : 137,293.94 = 54,166.85 : x
2. Step 2: Convert to fraction form
   99,488.96/137,293.94 = 54,166.85/x
3. Step 3: Cross multiply
   99,488.96x = 137,293.94 × 54,166.85
4. Step 4: Simplify right side
   99,488.96x = 7,436,780,253.89
5. Step 5: Solve for x
   x = 7,436,780,253.89/99,488.96
6. Step 6: Final answer
   x = 74,749.80