Finding the Fourth Proportional to 1,677.98, 2,315.52 and 931.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.98 : 2,315.52 = 931.89 : x
2. Step 2: Convert to fraction form
   1,677.98/2,315.52 = 931.89/x
3. Step 3: Cross multiply
   1,677.98x = 2,315.52 × 931.89
4. Step 4: Simplify right side
   1,677.98x = 2,157,805.59
5. Step 5: Solve for x
   x = 2,157,805.59/1,677.98
6. Step 6: Final answer
   x = 1,285.96