Finding the Fourth Proportional to 12,783.71, 19,186.63 and 12,754.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,783.71 : 19,186.63 = 12,754.15 : x
2. Step 2: Convert to fraction form
   12,783.71/19,186.63 = 12,754.15/x
3. Step 3: Cross multiply
   12,783.71x = 19,186.63 × 12,754.15
4. Step 4: Simplify right side
   12,783.71x = 244,709,157.01
5. Step 5: Solve for x
   x = 244,709,157.01/12,783.71
6. Step 6: Final answer
   x = 19,142.26