Finding the Fourth Proportional to 30,748.55, 42,425.17 and 18,807.53

Step by Step Solution

1. Step 1: Write the proportion equation
   30,748.55 : 42,425.17 = 18,807.53 : x
2. Step 2: Convert to fraction form
   30,748.55/42,425.17 = 18,807.53/x
3. Step 3: Cross multiply
   30,748.55x = 42,425.17 × 18,807.53
4. Step 4: Simplify right side
   30,748.55x = 797,912,398.39
5. Step 5: Solve for x
   x = 797,912,398.39/30,748.55
6. Step 6: Final answer
   x = 25,949.60