Finding the Fourth Proportional to 12,765.34, 17,611.24 and 9,416.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,765.34 : 17,611.24 = 9,416.10 : x
2. Step 2: Convert to fraction form
   12,765.34/17,611.24 = 9,416.10/x
3. Step 3: Cross multiply
   12,765.34x = 17,611.24 × 9,416.10
4. Step 4: Simplify right side
   12,765.34x = 165,829,196.96
5. Step 5: Solve for x
   x = 165,829,196.96/12,765.34
6. Step 6: Final answer
   x = 12,990.58