Finding the Fourth Proportional to 1,427.90, 1,970.55 and 798.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.90 : 1,970.55 = 798.53 : x
2. Step 2: Convert to fraction form
   1,427.90/1,970.55 = 798.53/x
3. Step 3: Cross multiply
   1,427.90x = 1,970.55 × 798.53
4. Step 4: Simplify right side
   1,427.90x = 1,573,533.44
5. Step 5: Solve for x
   x = 1,573,533.44/1,427.90
6. Step 6: Final answer
   x = 1,102.00