Finding the Fourth Proportional to 1,677.57, 2,315.02 and 931.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.57 : 2,315.02 = 931.53 : x
2. Step 2: Convert to fraction form
   1,677.57/2,315.02 = 931.53/x
3. Step 3: Cross multiply
   1,677.57x = 2,315.02 × 931.53
4. Step 4: Simplify right side
   1,677.57x = 2,156,510.58
5. Step 5: Solve for x
   x = 2,156,510.58/1,677.57
6. Step 6: Final answer
   x = 1,285.50