Finding the Fourth Proportional to 9,145.31, 12,611.80 and 5,560.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.31 : 12,611.80 = 5,560.88 : x
2. Step 2: Convert to fraction form
   9,145.31/12,611.80 = 5,560.88/x
3. Step 3: Cross multiply
   9,145.31x = 12,611.80 × 5,560.88
4. Step 4: Simplify right side
   9,145.31x = 70,132,724.01
5. Step 5: Solve for x
   x = 70,132,724.01/9,145.31
6. Step 6: Final answer
   x = 7,668.71