Finding the Fourth Proportional to 30,682.55, 42,342.43 and 20,072.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,682.55 : 42,342.43 = 20,072.18 : x
2. Step 2: Convert to fraction form
   30,682.55/42,342.43 = 20,072.18/x
3. Step 3: Cross multiply
   30,682.55x = 42,342.43 × 20,072.18
4. Step 4: Simplify right side
   30,682.55x = 849,904,935.50
5. Step 5: Solve for x
   x = 849,904,935.50/30,682.55
6. Step 6: Final answer
   x = 27,699.95