Finding the Fourth Proportional to 99,499.08, 137,309.94 and 54,176.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,499.08 : 137,309.94 = 54,176.88 : x
2. Step 2: Convert to fraction form
   99,499.08/137,309.94 = 54,176.88/x
3. Step 3: Cross multiply
   99,499.08x = 137,309.94 × 54,176.88
4. Step 4: Simplify right side
   99,499.08x = 7,439,024,142.19
5. Step 5: Solve for x
   x = 7,439,024,142.19/99,499.08
6. Step 6: Final answer
   x = 74,764.75