Finding the Fourth Proportional to 125,300.69, 172,747.65 and 99,544.68

Step by Step Solution

1. Step 1: Write the proportion equation
   125,300.69 : 172,747.65 = 99,544.68 : x
2. Step 2: Convert to fraction form
   125,300.69/172,747.65 = 99,544.68/x
3. Step 3: Cross multiply
   125,300.69x = 172,747.65 × 99,544.68
4. Step 4: Simplify right side
   125,300.69x = 17,196,109,540.00
5. Step 5: Solve for x
   x = 17,196,109,540.00/125,300.69
6. Step 6: Final answer
   x = 137,238.75