Finding the Fourth Proportional to 12,491.32, 17,236.74 and 7,185.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,491.32 : 17,236.74 = 7,185.10 : x
2. Step 2: Convert to fraction form
   12,491.32/17,236.74 = 7,185.10/x
3. Step 3: Cross multiply
   12,491.32x = 17,236.74 × 7,185.10
4. Step 4: Simplify right side
   12,491.32x = 123,847,700.57
5. Step 5: Solve for x
   x = 123,847,700.57/12,491.32
6. Step 6: Final answer
   x = 9,914.70