Finding the Fourth Proportional to 12,782.71, 19,185.13 and 12,753.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782.71 : 19,185.13 = 12,753.15 : x
2. Step 2: Convert to fraction form
   12,782.71/19,185.13 = 12,753.15/x
3. Step 3: Cross multiply
   12,782.71x = 19,185.13 × 12,753.15
4. Step 4: Simplify right side
   12,782.71x = 244,670,840.66
5. Step 5: Solve for x
   x = 244,670,840.66/12,782.71
6. Step 6: Final answer
   x = 19,140.76