Finding the Fourth Proportional to 12,705.90, 17,532.10 and 7,986.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.90 : 17,532.10 = 7,986.84 : x
2. Step 2: Convert to fraction form
   12,705.90/17,532.10 = 7,986.84/x
3. Step 3: Cross multiply
   12,705.90x = 17,532.10 × 7,986.84
4. Step 4: Simplify right side
   12,705.90x = 140,025,976.88
5. Step 5: Solve for x
   x = 140,025,976.88/12,705.90
6. Step 6: Final answer
   x = 11,020.55