Finding the Fourth Proportional to 123,358.20, 170,238.42 and 75,602.31

Step by Step Solution

1. Step 1: Write the proportion equation
   123,358.20 : 170,238.42 = 75,602.31 : x
2. Step 2: Convert to fraction form
   123,358.20/170,238.42 = 75,602.31/x
3. Step 3: Cross multiply
   123,358.20x = 170,238.42 × 75,602.31
4. Step 4: Simplify right side
   123,358.20x = 12,870,417,802.75
5. Step 5: Solve for x
   x = 12,870,417,802.75/123,358.20
6. Step 6: Final answer
   x = 104,333.70