Finding the Fourth Proportional to 1,386.99, 1,914.03 and 797.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.99 : 1,914.03 = 797.58 : x
2. Step 2: Convert to fraction form
   1,386.99/1,914.03 = 797.58/x
3. Step 3: Cross multiply
   1,386.99x = 1,914.03 × 797.58
4. Step 4: Simplify right side
   1,386.99x = 1,526,592.05
5. Step 5: Solve for x
   x = 1,526,592.05/1,386.99
6. Step 6: Final answer
   x = 1,100.65