Finding the Fourth Proportional to 2,158.95, 3,238.29 and 699.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.95 : 3,238.29 = 699.15 : x
2. Step 2: Convert to fraction form
   2,158.95/3,238.29 = 699.15/x
3. Step 3: Cross multiply
   2,158.95x = 3,238.29 × 699.15
4. Step 4: Simplify right side
   2,158.95x = 2,264,050.45
5. Step 5: Solve for x
   x = 2,264,050.45/2,158.95
6. Step 6: Final answer
   x = 1,048.68