Finding the Fourth Proportional to 12,670.27, 19,008.49 and 8,929.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,670.27 : 19,008.49 = 8,929.34 : x
2. Step 2: Convert to fraction form
   12,670.27/19,008.49 = 8,929.34/x
3. Step 3: Cross multiply
   12,670.27x = 19,008.49 × 8,929.34
4. Step 4: Simplify right side
   12,670.27x = 169,733,270.10
5. Step 5: Solve for x
   x = 169,733,270.10/12,670.27
6. Step 6: Final answer
   x = 13,396.19