Finding the Fourth Proportional to 12,950.46, 17,871.70 and 7,647.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,950.46 : 17,871.70 = 7,647.89 : x
2. Step 2: Convert to fraction form
   12,950.46/17,871.70 = 7,647.89/x
3. Step 3: Cross multiply
   12,950.46x = 17,871.70 × 7,647.89
4. Step 4: Simplify right side
   12,950.46x = 136,680,731.91
5. Step 5: Solve for x
   x = 136,680,731.91/12,950.46
6. Step 6: Final answer
   x = 10,554.13