Finding the Fourth Proportional to 12,071.58, 16,636.23 and 9,414.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,071.58 : 16,636.23 = 9,414.78 : x
2. Step 2: Convert to fraction form
   12,071.58/16,636.23 = 9,414.78/x
3. Step 3: Cross multiply
   12,071.58x = 16,636.23 × 9,414.78
4. Step 4: Simplify right side
   12,071.58x = 156,626,445.48
5. Step 5: Solve for x
   x = 156,626,445.48/12,071.58
6. Step 6: Final answer
   x = 12,974.81