Finding the Fourth Proportional to 12,705.20, 17,533.17 and 7,116.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.20 : 17,533.17 = 7,116.20 : x
2. Step 2: Convert to fraction form
   12,705.20/17,533.17 = 7,116.20/x
3. Step 3: Cross multiply
   12,705.20x = 17,533.17 × 7,116.20
4. Step 4: Simplify right side
   12,705.20x = 124,769,456.69
5. Step 5: Solve for x
   x = 124,769,456.69/12,705.20
6. Step 6: Final answer
   x = 9,820.35