Finding the Fourth Proportional to 9,123.96, 12,592.19 and 5,145

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.96 : 12,592.19 = 5,145 : x
2. Step 2: Convert to fraction form
   9,123.96/12,592.19 = 5,145/x
3. Step 3: Cross multiply
   9,123.96x = 12,592.19 × 5,145
4. Step 4: Simplify right side
   9,123.96x = 64,786,817.55
5. Step 5: Solve for x
   x = 64,786,817.55/9,123.96
6. Step 6: Final answer
   x = 7,100.73