Finding the Fourth Proportional to 1,677.38, 2,314.78 and 931.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.38 : 2,314.78 = 931.46 : x
2. Step 2: Convert to fraction form
   1,677.38/2,314.78 = 931.46/x
3. Step 3: Cross multiply
   1,677.38x = 2,314.78 × 931.46
4. Step 4: Simplify right side
   1,677.38x = 2,156,111.08
5. Step 5: Solve for x
   x = 2,156,111.08/1,677.38
6. Step 6: Final answer
   x = 1,285.41