Finding the Fourth Proportional to 9,123.48, 12,590.03 and 5,145.44

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.48 : 12,590.03 = 5,145.44 : x
2. Step 2: Convert to fraction form
   9,123.48/12,590.03 = 5,145.44/x
3. Step 3: Cross multiply
   9,123.48x = 12,590.03 × 5,145.44
4. Step 4: Simplify right side
   9,123.48x = 64,781,155.29
5. Step 5: Solve for x
   x = 64,781,155.29/9,123.48
6. Step 6: Final answer
   x = 7,100.49