Finding the Fourth Proportional to 12,705.70, 17,527.80 and 8,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.70 : 17,527.80 = 8,458.72 : x
2. Step 2: Convert to fraction form
   12,705.70/17,527.80 = 8,458.72/x
3. Step 3: Cross multiply
   12,705.70x = 17,527.80 × 8,458.72
4. Step 4: Simplify right side
   12,705.70x = 148,262,752.42
5. Step 5: Solve for x
   x = 148,262,752.42/12,705.70
6. Step 6: Final answer
   x = 11,669.00