Finding the Fourth Proportional to 9,613.85, 14,419.33 and 7,980.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,613.85 : 14,419.33 = 7,980.89 : x
2. Step 2: Convert to fraction form
   9,613.85/14,419.33 = 7,980.89/x
3. Step 3: Cross multiply
   9,613.85x = 14,419.33 × 7,980.89
4. Step 4: Simplify right side
   9,613.85x = 115,078,994.55
5. Step 5: Solve for x
   x = 115,078,994.55/9,613.85
6. Step 6: Final answer
   x = 11,970.13