Finding the Fourth Proportional to 28,123.46, 42,192.01 and 8,401.87

Step by Step Solution

1. Step 1: Write the proportion equation
   28,123.46 : 42,192.01 = 8,401.87 : x
2. Step 2: Convert to fraction form
   28,123.46/42,192.01 = 8,401.87/x
3. Step 3: Cross multiply
   28,123.46x = 42,192.01 × 8,401.87
4. Step 4: Simplify right side
   28,123.46x = 354,491,572.10
5. Step 5: Solve for x
   x = 354,491,572.10/28,123.46
6. Step 6: Final answer
   x = 12,604.84