Finding the Fourth Proportional to 1,677.34, 2,314.69 and 931.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.34 : 2,314.69 = 931.26 : x
2. Step 2: Convert to fraction form
   1,677.34/2,314.69 = 931.26/x
3. Step 3: Cross multiply
   1,677.34x = 2,314.69 × 931.26
4. Step 4: Simplify right side
   1,677.34x = 2,155,578.21
5. Step 5: Solve for x
   x = 2,155,578.21/1,677.34
6. Step 6: Final answer
   x = 1,285.12