Finding the Fourth Proportional to 12,705.08, 17,532.78 and 7,039.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.08 : 17,532.78 = 7,039.64 : x
2. Step 2: Convert to fraction form
   12,705.08/17,532.78 = 7,039.64/x
3. Step 3: Cross multiply
   12,705.08x = 17,532.78 × 7,039.64
4. Step 4: Simplify right side
   12,705.08x = 123,424,459.40
5. Step 5: Solve for x
   x = 123,424,459.40/12,705.08
6. Step 6: Final answer
   x = 9,714.58