Finding the Fourth Proportional to 1,310.10, 1,807.42 and 837.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,310.10 : 1,807.42 = 837.89 : x
2. Step 2: Convert to fraction form
   1,310.10/1,807.42 = 837.89/x
3. Step 3: Cross multiply
   1,310.10x = 1,807.42 × 837.89
4. Step 4: Simplify right side
   1,310.10x = 1,514,419.75
5. Step 5: Solve for x
   x = 1,514,419.75/1,310.10
6. Step 6: Final answer
   x = 1,155.95