Finding the Fourth Proportional to 12,728.27, 19,061.24 and 8,970.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,728.27 : 19,061.24 = 8,970.82 : x
2. Step 2: Convert to fraction form
   12,728.27/19,061.24 = 8,970.82/x
3. Step 3: Cross multiply
   12,728.27x = 19,061.24 × 8,970.82
4. Step 4: Simplify right side
   12,728.27x = 170,994,857.71
5. Step 5: Solve for x
   x = 170,994,857.71/12,728.27
6. Step 6: Final answer
   x = 13,434.26