Finding the Fourth Proportional to 1,877.50, 2,815.57 and 837.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.50 : 2,815.57 = 837.31 : x
2. Step 2: Convert to fraction form
   1,877.50/2,815.57 = 837.31/x
3. Step 3: Cross multiply
   1,877.50x = 2,815.57 × 837.31
4. Step 4: Simplify right side
   1,877.50x = 2,357,513.30
5. Step 5: Solve for x
   x = 2,357,513.30/1,877.50
6. Step 6: Final answer
   x = 1,255.66