Finding the Fourth Proportional to 30,591.34, 42,229 and 18,658.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,591.34 : 42,229 = 18,658.96 : x
2. Step 2: Convert to fraction form
   30,591.34/42,229 = 18,658.96/x
3. Step 3: Cross multiply
   30,591.34x = 42,229 × 18,658.96
4. Step 4: Simplify right side
   30,591.34x = 787,949,221.84
5. Step 5: Solve for x
   x = 787,949,221.84/30,591.34
6. Step 6: Final answer
   x = 25,757.26