Finding the Fourth Proportional to 1,677.83, 2,315.42 and 931.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.83 : 2,315.42 = 931.83 : x
2. Step 2: Convert to fraction form
   1,677.83/2,315.42 = 931.83/x
3. Step 3: Cross multiply
   1,677.83x = 2,315.42 × 931.83
4. Step 4: Simplify right side
   1,677.83x = 2,157,577.82
5. Step 5: Solve for x
   x = 2,157,577.82/1,677.83
6. Step 6: Final answer
   x = 1,285.93