Finding the Fourth Proportional to 10,340.48, 15,510.78 and 7,045.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,340.48 : 15,510.78 = 7,045.40 : x
2. Step 2: Convert to fraction form
   10,340.48/15,510.78 = 7,045.40/x
3. Step 3: Cross multiply
   10,340.48x = 15,510.78 × 7,045.40
4. Step 4: Simplify right side
   10,340.48x = 109,279,571.86
5. Step 5: Solve for x
   x = 109,279,571.86/10,340.48
6. Step 6: Final answer
   x = 10,568.14