Finding the Fourth Proportional to 1,395.43, 2,091.86 and 692.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.43 : 2,091.86 = 692.48 : x
2. Step 2: Convert to fraction form
   1,395.43/2,091.86 = 692.48/x
3. Step 3: Cross multiply
   1,395.43x = 2,091.86 × 692.48
4. Step 4: Simplify right side
   1,395.43x = 1,448,575.58
5. Step 5: Solve for x
   x = 1,448,575.58/1,395.43
6. Step 6: Final answer
   x = 1,038.09