Finding the Fourth Proportional to 31,010.61, 42,796.51 and 18,272.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,010.61 : 42,796.51 = 18,272.28 : x
2. Step 2: Convert to fraction form
   31,010.61/42,796.51 = 18,272.28/x
3. Step 3: Cross multiply
   31,010.61x = 42,796.51 × 18,272.28
4. Step 4: Simplify right side
   31,010.61x = 781,989,821.56
5. Step 5: Solve for x
   x = 781,989,821.56/31,010.61
6. Step 6: Final answer
   x = 25,216.85