Finding the Fourth Proportional to 1,677.34, 2,314.49 and 931.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.34 : 2,314.49 = 931.31 : x
2. Step 2: Convert to fraction form
   1,677.34/2,314.49 = 931.31/x
3. Step 3: Cross multiply
   1,677.34x = 2,314.49 × 931.31
4. Step 4: Simplify right side
   1,677.34x = 2,155,491.45
5. Step 5: Solve for x
   x = 2,155,491.45/1,677.34
6. Step 6: Final answer
   x = 1,285.07