Finding the Fourth Proportional to 1,387.98, 2,083.37 and 695.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.98 : 2,083.37 = 695.15 : x
2. Step 2: Convert to fraction form
   1,387.98/2,083.37 = 695.15/x
3. Step 3: Cross multiply
   1,387.98x = 2,083.37 × 695.15
4. Step 4: Simplify right side
   1,387.98x = 1,448,240.76
5. Step 5: Solve for x
   x = 1,448,240.76/1,387.98
6. Step 6: Final answer
   x = 1,043.42