Finding the Fourth Proportional to 8,985.72, 12,411.60 and 7,574.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,985.72 : 12,411.60 = 7,574.10 : x
2. Step 2: Convert to fraction form
   8,985.72/12,411.60 = 7,574.10/x
3. Step 3: Cross multiply
   8,985.72x = 12,411.60 × 7,574.10
4. Step 4: Simplify right side
   8,985.72x = 94,006,699.56
5. Step 5: Solve for x
   x = 94,006,699.56/8,985.72
6. Step 6: Final answer
   x = 10,461.79