Finding the Fourth Proportional to 2,079.15, 3,117.90 and 692.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.15 : 3,117.90 = 692.10 : x
2. Step 2: Convert to fraction form
   2,079.15/3,117.90 = 692.10/x
3. Step 3: Cross multiply
   2,079.15x = 3,117.90 × 692.10
4. Step 4: Simplify right side
   2,079.15x = 2,157,898.59
5. Step 5: Solve for x
   x = 2,157,898.59/2,079.15
6. Step 6: Final answer
   x = 1,037.88