Finding the Fourth Proportional to 12,743.18, 19,114.32 and 3,978.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,743.18 : 19,114.32 = 3,978.14 : x
2. Step 2: Convert to fraction form
   12,743.18/19,114.32 = 3,978.14/x
3. Step 3: Cross multiply
   12,743.18x = 19,114.32 × 3,978.14
4. Step 4: Simplify right side
   12,743.18x = 76,039,440.96
5. Step 5: Solve for x
   x = 76,039,440.96/12,743.18
6. Step 6: Final answer
   x = 5,967.07