Finding the Fourth Proportional to 1,912.10, 2,850.17 and 1,702.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.10 : 2,850.17 = 1,702.78 : x
2. Step 2: Convert to fraction form
   1,912.10/2,850.17 = 1,702.78/x
3. Step 3: Cross multiply
   1,912.10x = 2,850.17 × 1,702.78
4. Step 4: Simplify right side
   1,912.10x = 4,853,196.83
5. Step 5: Solve for x
   x = 4,853,196.83/1,912.10
6. Step 6: Final answer
   x = 2,538.16