Finding the Fourth Proportional to 31,129.54, 42,952.89 and 18,555.46

Step by Step Solution

1. Step 1: Write the proportion equation
   31,129.54 : 42,952.89 = 18,555.46 : x
2. Step 2: Convert to fraction form
   31,129.54/42,952.89 = 18,555.46/x
3. Step 3: Cross multiply
   31,129.54x = 42,952.89 × 18,555.46
4. Step 4: Simplify right side
   31,129.54x = 797,010,632.28
5. Step 5: Solve for x
   x = 797,010,632.28/31,129.54
6. Step 6: Final answer
   x = 25,603.03