Finding the Fourth Proportional to 1,201.31, 1,792.54 and 1,078.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,201.31 : 1,792.54 = 1,078.60 : x
2. Step 2: Convert to fraction form
   1,201.31/1,792.54 = 1,078.60/x
3. Step 3: Cross multiply
   1,201.31x = 1,792.54 × 1,078.60
4. Step 4: Simplify right side
   1,201.31x = 1,933,426.47
5. Step 5: Solve for x
   x = 1,933,426.47/1,201.31
6. Step 6: Final answer
   x = 1,609.43