Finding the Fourth Proportional to 1,677.62, 2,315.10 and 931.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.62 : 2,315.10 = 931.56 : x
2. Step 2: Convert to fraction form
   1,677.62/2,315.10 = 931.56/x
3. Step 3: Cross multiply
   1,677.62x = 2,315.10 × 931.56
4. Step 4: Simplify right side
   1,677.62x = 2,156,654.56
5. Step 5: Solve for x
   x = 2,156,654.56/1,677.62
6. Step 6: Final answer
   x = 1,285.54