Finding the Fourth Proportional to 12,662.86, 17,472.90 and 7,948.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,662.86 : 17,472.90 = 7,948.66 : x
2. Step 2: Convert to fraction form
   12,662.86/17,472.90 = 7,948.66/x
3. Step 3: Cross multiply
   12,662.86x = 17,472.90 × 7,948.66
4. Step 4: Simplify right side
   12,662.86x = 138,886,141.31
5. Step 5: Solve for x
   x = 138,886,141.31/12,662.86
6. Step 6: Final answer
   x = 10,967.99