Finding the Fourth Proportional to 8,967.31, 13,451.03 and 3,123.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,967.31 : 13,451.03 = 3,123.90 : x
2. Step 2: Convert to fraction form
   8,967.31/13,451.03 = 3,123.90/x
3. Step 3: Cross multiply
   8,967.31x = 13,451.03 × 3,123.90
4. Step 4: Simplify right side
   8,967.31x = 42,019,672.62
5. Step 5: Solve for x
   x = 42,019,672.62/8,967.31
6. Step 6: Final answer
   x = 4,685.87