Finding the Fourth Proportional to 30,892.50, 42,631.89 and 18,328.02

Step by Step Solution

1. Step 1: Write the proportion equation
   30,892.50 : 42,631.89 = 18,328.02 : x
2. Step 2: Convert to fraction form
   30,892.50/42,631.89 = 18,328.02/x
3. Step 3: Cross multiply
   30,892.50x = 42,631.89 × 18,328.02
4. Step 4: Simplify right side
   30,892.50x = 781,358,132.56
5. Step 5: Solve for x
   x = 781,358,132.56/30,892.50
6. Step 6: Final answer
   x = 25,292.81