Finding the Fourth Proportional to 1,238.52, 1,865.12 and 1,078.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.52 : 1,865.12 = 1,078.14 : x
2. Step 2: Convert to fraction form
   1,238.52/1,865.12 = 1,078.14/x
3. Step 3: Cross multiply
   1,238.52x = 1,865.12 × 1,078.14
4. Step 4: Simplify right side
   1,238.52x = 2,010,860.48
5. Step 5: Solve for x
   x = 2,010,860.48/1,238.52
6. Step 6: Final answer
   x = 1,623.60