Finding the Fourth Proportional to 123,263.13, 170,105.37 and 72,312.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,263.13 : 170,105.37 = 72,312.42 : x
2. Step 2: Convert to fraction form
   123,263.13/170,105.37 = 72,312.42/x
3. Step 3: Cross multiply
   123,263.13x = 170,105.37 × 72,312.42
4. Step 4: Simplify right side
   123,263.13x = 12,300,730,959.70
5. Step 5: Solve for x
   x = 12,300,730,959.70/123,263.13
6. Step 6: Final answer
   x = 99,792.46