Finding the Fourth Proportional to 1,687.34, 2,328.51 and 941.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.34 : 2,328.51 = 941.31 : x
2. Step 2: Convert to fraction form
   1,687.34/2,328.51 = 941.31/x
3. Step 3: Cross multiply
   1,687.34x = 2,328.51 × 941.31
4. Step 4: Simplify right side
   1,687.34x = 2,191,849.75
5. Step 5: Solve for x
   x = 2,191,849.75/1,687.34
6. Step 6: Final answer
   x = 1,299.00