Finding the Fourth Proportional to 7,144.61, 9,862.76 and 5,376.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,144.61 : 9,862.76 = 5,376.78 : x
2. Step 2: Convert to fraction form
   7,144.61/9,862.76 = 5,376.78/x
3. Step 3: Cross multiply
   7,144.61x = 9,862.76 × 5,376.78
4. Step 4: Simplify right side
   7,144.61x = 53,029,904.15
5. Step 5: Solve for x
   x = 53,029,904.15/7,144.61
6. Step 6: Final answer
   x = 7,422.37