Finding the Fourth Proportional to 12,848.79, 17,732.49 and 7,811.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,848.79 : 17,732.49 = 7,811.82 : x
2. Step 2: Convert to fraction form
   12,848.79/17,732.49 = 7,811.82/x
3. Step 3: Cross multiply
   12,848.79x = 17,732.49 × 7,811.82
4. Step 4: Simplify right side
   12,848.79x = 138,523,020.03
5. Step 5: Solve for x
   x = 138,523,020.03/12,848.79
6. Step 6: Final answer
   x = 10,781.02