Finding the Fourth Proportional to 31,073.78, 42,879.20 and 17,460.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,073.78 : 42,879.20 = 17,460.78 : x
2. Step 2: Convert to fraction form
   31,073.78/42,879.20 = 17,460.78/x
3. Step 3: Cross multiply
   31,073.78x = 42,879.20 × 17,460.78
4. Step 4: Simplify right side
   31,073.78x = 748,704,190.47
5. Step 5: Solve for x
   x = 748,704,190.47/31,073.78
6. Step 6: Final answer
   x = 24,094.41