Finding the Fourth Proportional to 1,356.58, 1,871.96 and 797.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.58 : 1,871.96 = 797.30 : x
2. Step 2: Convert to fraction form
   1,356.58/1,871.96 = 797.30/x
3. Step 3: Cross multiply
   1,356.58x = 1,871.96 × 797.30
4. Step 4: Simplify right side
   1,356.58x = 1,492,513.71
5. Step 5: Solve for x
   x = 1,492,513.71/1,356.58
6. Step 6: Final answer
   x = 1,100.20