Finding the Fourth Proportional to 1,677.31, 2,314.68 and 931.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.31 : 2,314.68 = 931.35 : x
2. Step 2: Convert to fraction form
   1,677.31/2,314.68 = 931.35/x
3. Step 3: Cross multiply
   1,677.31x = 2,314.68 × 931.35
4. Step 4: Simplify right side
   1,677.31x = 2,155,777.22
5. Step 5: Solve for x
   x = 2,155,777.22/1,677.31
6. Step 6: Final answer
   x = 1,285.26