Finding the Fourth Proportional to 12,945.60, 17,867.82 and 8,461.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.60 : 17,867.82 = 8,461.98 : x
2. Step 2: Convert to fraction form
   12,945.60/17,867.82 = 8,461.98/x
3. Step 3: Cross multiply
   12,945.60x = 17,867.82 × 8,461.98
4. Step 4: Simplify right side
   12,945.60x = 151,197,135.48
5. Step 5: Solve for x
   x = 151,197,135.48/12,945.60
6. Step 6: Final answer
   x = 11,679.42