Finding the Fourth Proportional to 8,748.07, 13,029.31 and 8,705.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,748.07 : 13,029.31 = 8,705.69 : x
2. Step 2: Convert to fraction form
   8,748.07/13,029.31 = 8,705.69/x
3. Step 3: Cross multiply
   8,748.07x = 13,029.31 × 8,705.69
4. Step 4: Simplify right side
   8,748.07x = 113,429,133.77
5. Step 5: Solve for x
   x = 113,429,133.77/8,748.07
6. Step 6: Final answer
   x = 12,966.20