Finding the Fourth Proportional to 123,826.23, 185,606.33 and 81,115.29

Step by Step Solution

1. Step 1: Write the proportion equation
   123,826.23 : 185,606.33 = 81,115.29 : x
2. Step 2: Convert to fraction form
   123,826.23/185,606.33 = 81,115.29/x
3. Step 3: Cross multiply
   123,826.23x = 185,606.33 × 81,115.29
4. Step 4: Simplify right side
   123,826.23x = 15,055,510,878.21
5. Step 5: Solve for x
   x = 15,055,510,878.21/123,826.23
6. Step 6: Final answer
   x = 121,585.80