Finding the Fourth Proportional to 1,677.56, 2,315.03 and 931.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.56 : 2,315.03 = 931.59 : x
2. Step 2: Convert to fraction form
   1,677.56/2,315.03 = 931.59/x
3. Step 3: Cross multiply
   1,677.56x = 2,315.03 × 931.59
4. Step 4: Simplify right side
   1,677.56x = 2,156,654.14
5. Step 5: Solve for x
   x = 2,156,654.14/1,677.56
6. Step 6: Final answer
   x = 1,285.59