Finding the Fourth Proportional to 123,290.50, 170,131.20 and 75,537.35

Step by Step Solution

1. Step 1: Write the proportion equation
   123,290.50 : 170,131.20 = 75,537.35 : x
2. Step 2: Convert to fraction form
   123,290.50/170,131.20 = 75,537.35/x
3. Step 3: Cross multiply
   123,290.50x = 170,131.20 × 75,537.35
4. Step 4: Simplify right side
   123,290.50x = 12,851,260,142.38
5. Step 5: Solve for x
   x = 12,851,260,142.38/123,290.50
6. Step 6: Final answer
   x = 104,235.61