Finding the Fourth Proportional to 8,434.02, 12,708.18 and 7,005.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,434.02 : 12,708.18 = 7,005.18 : x
2. Step 2: Convert to fraction form
   8,434.02/12,708.18 = 7,005.18/x
3. Step 3: Cross multiply
   8,434.02x = 12,708.18 × 7,005.18
4. Step 4: Simplify right side
   8,434.02x = 89,023,088.37
5. Step 5: Solve for x
   x = 89,023,088.37/8,434.02
6. Step 6: Final answer
   x = 10,555.24