Finding the Fourth Proportional to 9,145.27, 12,621.10 and 5,561.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.27 : 12,621.10 = 5,561.63 : x
2. Step 2: Convert to fraction form
   9,145.27/12,621.10 = 5,561.63/x
3. Step 3: Cross multiply
   9,145.27x = 12,621.10 × 5,561.63
4. Step 4: Simplify right side
   9,145.27x = 70,193,825.29
5. Step 5: Solve for x
   x = 70,193,825.29/9,145.27
6. Step 6: Final answer
   x = 7,675.43