Finding the Fourth Proportional to 99,790.85, 137,710.23 and 54,468.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,790.85 : 137,710.23 = 54,468.50 : x
2. Step 2: Convert to fraction form
   99,790.85/137,710.23 = 54,468.50/x
3. Step 3: Cross multiply
   99,790.85x = 137,710.23 × 54,468.50
4. Step 4: Simplify right side
   99,790.85x = 7,500,868,974.20
5. Step 5: Solve for x
   x = 7,500,868,974.20/99,790.85
6. Step 6: Final answer
   x = 75,165.90