Finding the Fourth Proportional to 99,496.55, 137,308.59 and 54,176.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,496.55 : 137,308.59 = 54,176.28 : x
2. Step 2: Convert to fraction form
   99,496.55/137,308.59 = 54,176.28/x
3. Step 3: Cross multiply
   99,496.55x = 137,308.59 × 54,176.28
4. Step 4: Simplify right side
   99,496.55x = 7,438,868,618.25
5. Step 5: Solve for x
   x = 7,438,868,618.25/99,496.55
6. Step 6: Final answer
   x = 74,765.09