Finding the Fourth Proportional to 9,123.72, 12,590.10 and 5,397

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.72 : 12,590.10 = 5,397 : x
2. Step 2: Convert to fraction form
   9,123.72/12,590.10 = 5,397/x
3. Step 3: Cross multiply
   9,123.72x = 12,590.10 × 5,397
4. Step 4: Simplify right side
   9,123.72x = 67,948,769.70
5. Step 5: Solve for x
   x = 67,948,769.70/9,123.72
6. Step 6: Final answer
   x = 7,447.49