Finding the Fourth Proportional to 12,197.34, 16,830.72 and 7,713.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,197.34 : 16,830.72 = 7,713.18 : x
2. Step 2: Convert to fraction form
   12,197.34/16,830.72 = 7,713.18/x
3. Step 3: Cross multiply
   12,197.34x = 16,830.72 × 7,713.18
4. Step 4: Simplify right side
   12,197.34x = 129,818,372.89
5. Step 5: Solve for x
   x = 129,818,372.89/12,197.34
6. Step 6: Final answer
   x = 10,643.17