Finding the Fourth Proportional to 12,980.75, 17,922.06 and 8,736.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.75 : 17,922.06 = 8,736.60 : x
2. Step 2: Convert to fraction form
   12,980.75/17,922.06 = 8,736.60/x
3. Step 3: Cross multiply
   12,980.75x = 17,922.06 × 8,736.60
4. Step 4: Simplify right side
   12,980.75x = 156,577,869.40
5. Step 5: Solve for x
   x = 156,577,869.40/12,980.75
6. Step 6: Final answer
   x = 12,062.32