Finding the Fourth Proportional to 30,538.76, 42,143.52 and 18,602.15

Step by Step Solution

1. Step 1: Write the proportion equation
   30,538.76 : 42,143.52 = 18,602.15 : x
2. Step 2: Convert to fraction form
   30,538.76/42,143.52 = 18,602.15/x
3. Step 3: Cross multiply
   30,538.76x = 42,143.52 × 18,602.15
4. Step 4: Simplify right side
   30,538.76x = 783,959,869.85
5. Step 5: Solve for x
   x = 783,959,869.85/30,538.76
6. Step 6: Final answer
   x = 25,670.98