Finding the Fourth Proportional to 30,688.50, 42,350.18 and 18,113.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,688.50 : 42,350.18 = 18,113.25 : x
2. Step 2: Convert to fraction form
   30,688.50/42,350.18 = 18,113.25/x
3. Step 3: Cross multiply
   30,688.50x = 42,350.18 × 18,113.25
4. Step 4: Simplify right side
   30,688.50x = 767,099,307.32
5. Step 5: Solve for x
   x = 767,099,307.32/30,688.50
6. Step 6: Final answer
   x = 24,996.31