Finding the Fourth Proportional to 1,386.87, 1,914.06 and 797.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.87 : 1,914.06 = 797.39 : x
2. Step 2: Convert to fraction form
   1,386.87/1,914.06 = 797.39/x
3. Step 3: Cross multiply
   1,386.87x = 1,914.06 × 797.39
4. Step 4: Simplify right side
   1,386.87x = 1,526,242.73
5. Step 5: Solve for x
   x = 1,526,242.73/1,386.87
6. Step 6: Final answer
   x = 1,100.49