Finding the Fourth Proportional to 31,079.89, 42,895.80 and 18,332.29

Step by Step Solution

1. Step 1: Write the proportion equation
   31,079.89 : 42,895.80 = 18,332.29 : x
2. Step 2: Convert to fraction form
   31,079.89/42,895.80 = 18,332.29/x
3. Step 3: Cross multiply
   31,079.89x = 42,895.80 × 18,332.29
4. Step 4: Simplify right side
   31,079.89x = 786,378,245.38
5. Step 5: Solve for x
   x = 786,378,245.38/31,079.89
6. Step 6: Final answer
   x = 25,301.83