Finding the Fourth Proportional to 99,951.68, 137,929.57 and 54,629.30

Step by Step Solution

1. Step 1: Write the proportion equation
   99,951.68 : 137,929.57 = 54,629.30 : x
2. Step 2: Convert to fraction form
   99,951.68/137,929.57 = 54,629.30/x
3. Step 3: Cross multiply
   99,951.68x = 137,929.57 × 54,629.30
4. Step 4: Simplify right side
   99,951.68x = 7,534,995,513.58
5. Step 5: Solve for x
   x = 7,534,995,513.58/99,951.68
6. Step 6: Final answer
   x = 75,386.38