Finding the Fourth Proportional to 1,359.25, 1,877.39 and 916.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.25 : 1,877.39 = 916.39 : x
2. Step 2: Convert to fraction form
   1,359.25/1,877.39 = 916.39/x
3. Step 3: Cross multiply
   1,359.25x = 1,877.39 × 916.39
4. Step 4: Simplify right side
   1,359.25x = 1,720,421.42
5. Step 5: Solve for x
   x = 1,720,421.42/1,359.25
6. Step 6: Final answer
   x = 1,265.71