Finding the Fourth Proportional to 1,435.54, 1,980.92 and 797.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.54 : 1,980.92 = 797.50 : x
2. Step 2: Convert to fraction form
   1,435.54/1,980.92 = 797.50/x
3. Step 3: Cross multiply
   1,435.54x = 1,980.92 × 797.50
4. Step 4: Simplify right side
   1,435.54x = 1,579,783.70
5. Step 5: Solve for x
   x = 1,579,783.70/1,435.54
6. Step 6: Final answer
   x = 1,100.48