Finding the Fourth Proportional to 9,483.96, 13,061.26 and 9,279.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,483.96 : 13,061.26 = 9,279.80 : x
2. Step 2: Convert to fraction form
   9,483.96/13,061.26 = 9,279.80/x
3. Step 3: Cross multiply
   9,483.96x = 13,061.26 × 9,279.80
4. Step 4: Simplify right side
   9,483.96x = 121,205,880.55
5. Step 5: Solve for x
   x = 121,205,880.55/9,483.96
6. Step 6: Final answer
   x = 12,780.09