Finding the Fourth Proportional to 99,508.50, 137,321.73 and 54,796.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,508.50 : 137,321.73 = 54,796.50 : x
2. Step 2: Convert to fraction form
   99,508.50/137,321.73 = 54,796.50/x
3. Step 3: Cross multiply
   99,508.50x = 137,321.73 × 54,796.50
4. Step 4: Simplify right side
   99,508.50x = 7,524,750,177.95
5. Step 5: Solve for x
   x = 7,524,750,177.95/99,508.50
6. Step 6: Final answer
   x = 75,619.17