Finding the Fourth Proportional to 123,721.29, 170,726.00 and 72,736.11

Step by Step Solution

1. Step 1: Write the proportion equation
   123,721.29 : 170,726.00 = 72,736.11 : x
2. Step 2: Convert to fraction form
   123,721.29/170,726.00 = 72,736.11/x
3. Step 3: Cross multiply
   123,721.29x = 170,726.00 × 72,736.11
4. Step 4: Simplify right side
   123,721.29x = 12,417,944,752.18
5. Step 5: Solve for x
   x = 12,417,944,752.18/123,721.29
6. Step 6: Final answer
   x = 100,370.31