Finding the Fourth Proportional to 1,078,128.80, 1,617,337.20 and 367,978.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,128.80 : 1,617,337.20 = 367,978.40 : x
2. Step 2: Convert to fraction form
   1,078,128.80/1,617,337.20 = 367,978.40/x
3. Step 3: Cross multiply
   1,078,128.80x = 1,617,337.20 × 367,978.40
4. Step 4: Simplify right side
   1,078,128.80x = 595,145,155,116.48
5. Step 5: Solve for x
   x = 595,145,155,116.48/1,078,128.80
6. Step 6: Final answer
   x = 552,016.75