Finding the Fourth Proportional to 1,386.49, 1,913.41 and 797.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.49 : 1,913.41 = 797.08 : x
2. Step 2: Convert to fraction form
   1,386.49/1,913.41 = 797.08/x
3. Step 3: Cross multiply
   1,386.49x = 1,913.41 × 797.08
4. Step 4: Simplify right side
   1,386.49x = 1,525,140.84
5. Step 5: Solve for x
   x = 1,525,140.84/1,386.49
6. Step 6: Final answer
   x = 1,100.00