Finding the Fourth Proportional to 123,600.51, 170,570.03 and 72,615.38

Step by Step Solution

1. Step 1: Write the proportion equation
   123,600.51 : 170,570.03 = 72,615.38 : x
2. Step 2: Convert to fraction form
   123,600.51/170,570.03 = 72,615.38/x
3. Step 3: Cross multiply
   123,600.51x = 170,570.03 × 72,615.38
4. Step 4: Simplify right side
   123,600.51x = 12,386,006,329.13
5. Step 5: Solve for x
   x = 12,386,006,329.13/123,600.51
6. Step 6: Final answer
   x = 100,209.99