Finding the Fourth Proportional to 124,128.73, 170,865.06 and 108,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   124,128.73 : 170,865.06 = 108,185.50 : x
2. Step 2: Convert to fraction form
   124,128.73/170,865.06 = 108,185.50/x
3. Step 3: Cross multiply
   124,128.73x = 170,865.06 × 108,185.50
4. Step 4: Simplify right side
   124,128.73x = 18,485,121,948.63
5. Step 5: Solve for x
   x = 18,485,121,948.63/124,128.73
6. Step 6: Final answer
   x = 148,918.96