Finding the Fourth Proportional to 123,436.17, 170,345.03 and 75,715.83

Step by Step Solution

1. Step 1: Write the proportion equation
   123,436.17 : 170,345.03 = 75,715.83 : x
2. Step 2: Convert to fraction form
   123,436.17/170,345.03 = 75,715.83/x
3. Step 3: Cross multiply
   123,436.17x = 170,345.03 × 75,715.83
4. Step 4: Simplify right side
   123,436.17x = 12,897,814,954.25
5. Step 5: Solve for x
   x = 12,897,814,954.25/123,436.17
6. Step 6: Final answer
   x = 104,489.75