Finding the Fourth Proportional to 12,665.90, 17,479.17 and 7,000.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.90 : 17,479.17 = 7,000.98 : x
2. Step 2: Convert to fraction form
   12,665.90/17,479.17 = 7,000.98/x
3. Step 3: Cross multiply
   12,665.90x = 17,479.17 × 7,000.98
4. Step 4: Simplify right side
   12,665.90x = 122,371,319.59
5. Step 5: Solve for x
   x = 122,371,319.59/12,665.90
6. Step 6: Final answer
   x = 9,661.48