Finding the Fourth Proportional to 12,785.51, 17,644.73 and 7,750.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,785.51 : 17,644.73 = 7,750.17 : x
2. Step 2: Convert to fraction form
   12,785.51/17,644.73 = 7,750.17/x
3. Step 3: Cross multiply
   12,785.51x = 17,644.73 × 7,750.17
4. Step 4: Simplify right side
   12,785.51x = 136,749,618.35
5. Step 5: Solve for x
   x = 136,749,618.35/12,785.51
6. Step 6: Final answer
   x = 10,695.67