Finding the Fourth Proportional to 1,390.88, 1,919.24 and 793.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390.88 : 1,919.24 = 793.16 : x
2. Step 2: Convert to fraction form
   1,390.88/1,919.24 = 793.16/x
3. Step 3: Cross multiply
   1,390.88x = 1,919.24 × 793.16
4. Step 4: Simplify right side
   1,390.88x = 1,522,264.40
5. Step 5: Solve for x
   x = 1,522,264.40/1,390.88
6. Step 6: Final answer
   x = 1,094.46