Finding the Fourth Proportional to 31,060.24, 42,860.94 and 17,631.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,060.24 : 42,860.94 = 17,631.78 : x
2. Step 2: Convert to fraction form
   31,060.24/42,860.94 = 17,631.78/x
3. Step 3: Cross multiply
   31,060.24x = 42,860.94 × 17,631.78
4. Step 4: Simplify right side
   31,060.24x = 755,714,664.67
5. Step 5: Solve for x
   x = 755,714,664.67/31,060.24
6. Step 6: Final answer
   x = 24,330.61