Finding the Fourth Proportional to 1,677.93, 2,315.50 and 931.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.93 : 2,315.50 = 931.89 : x
2. Step 2: Convert to fraction form
   1,677.93/2,315.50 = 931.89/x
3. Step 3: Cross multiply
   1,677.93x = 2,315.50 × 931.89
4. Step 4: Simplify right side
   1,677.93x = 2,157,791.30
5. Step 5: Solve for x
   x = 2,157,791.30/1,677.93
6. Step 6: Final answer
   x = 1,285.98