Finding the Fourth Proportional to 12,670.30, 17,485.51 and 8,414.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,670.30 : 17,485.51 = 8,414.02 : x
2. Step 2: Convert to fraction form
   12,670.30/17,485.51 = 8,414.02/x
3. Step 3: Cross multiply
   12,670.30x = 17,485.51 × 8,414.02
4. Step 4: Simplify right side
   12,670.30x = 147,123,388.78
5. Step 5: Solve for x
   x = 147,123,388.78/12,670.30
6. Step 6: Final answer
   x = 11,611.67