Finding the Fourth Proportional to 1,386.53, 1,913.45 and 797.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.53 : 1,913.45 = 797.05 : x
2. Step 2: Convert to fraction form
   1,386.53/1,913.45 = 797.05/x
3. Step 3: Cross multiply
   1,386.53x = 1,913.45 × 797.05
4. Step 4: Simplify right side
   1,386.53x = 1,525,115.32
5. Step 5: Solve for x
   x = 1,525,115.32/1,386.53
6. Step 6: Final answer
   x = 1,099.95