Finding the Fourth Proportional to 31,086.66, 42,897.51 and 18,339.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086.66 : 42,897.51 = 18,339.18 : x
2. Step 2: Convert to fraction form
   31,086.66/42,897.51 = 18,339.18/x
3. Step 3: Cross multiply
   31,086.66x = 42,897.51 × 18,339.18
4. Step 4: Simplify right side
   31,086.66x = 786,705,157.44
5. Step 5: Solve for x
   x = 786,705,157.44/31,086.66
6. Step 6: Final answer
   x = 25,306.84