Finding the Fourth Proportional to 123,505.89, 170,372.38 and 75,122.61

Step by Step Solution

1. Step 1: Write the proportion equation
   123,505.89 : 170,372.38 = 75,122.61 : x
2. Step 2: Convert to fraction form
   123,505.89/170,372.38 = 75,122.61/x
3. Step 3: Cross multiply
   123,505.89x = 170,372.38 × 75,122.61
4. Step 4: Simplify right side
   123,505.89x = 12,798,817,857.51
5. Step 5: Solve for x
   x = 12,798,817,857.51/123,505.89
6. Step 6: Final answer
   x = 103,629.21