Finding the Fourth Proportional to 12,488.34, 17,216.04 and 7,705.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.34 : 17,216.04 = 7,705.08 : x
2. Step 2: Convert to fraction form
   12,488.34/17,216.04 = 7,705.08/x
3. Step 3: Cross multiply
   12,488.34x = 17,216.04 × 7,705.08
4. Step 4: Simplify right side
   12,488.34x = 132,650,965.48
5. Step 5: Solve for x
   x = 132,650,965.48/12,488.34
6. Step 6: Final answer
   x = 10,621.99