Finding the Fourth Proportional to 3,432.18, 5,148.99 and 1,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,432.18 : 5,148.99 = 1,123.50 : x
2. Step 2: Convert to fraction form
   3,432.18/5,148.99 = 1,123.50/x
3. Step 3: Cross multiply
   3,432.18x = 5,148.99 × 1,123.50
4. Step 4: Simplify right side
   3,432.18x = 5,784,890.27
5. Step 5: Solve for x
   x = 5,784,890.27/3,432.18
6. Step 6: Final answer
   x = 1,685.49