Finding the Fourth Proportional to 12,852.66, 17,729.82 and 7,818.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,852.66 : 17,729.82 = 7,818.42 : x
2. Step 2: Convert to fraction form
   12,852.66/17,729.82 = 7,818.42/x
3. Step 3: Cross multiply
   12,852.66x = 17,729.82 × 7,818.42
4. Step 4: Simplify right side
   12,852.66x = 138,619,140.19
5. Step 5: Solve for x
   x = 138,619,140.19/12,852.66
6. Step 6: Final answer
   x = 10,785.25