Finding the Fourth Proportional to 1,931.85, 2,664.90 and 1,145.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.85 : 2,664.90 = 1,145.34 : x
2. Step 2: Convert to fraction form
   1,931.85/2,664.90 = 1,145.34/x
3. Step 3: Cross multiply
   1,931.85x = 2,664.90 × 1,145.34
4. Step 4: Simplify right side
   1,931.85x = 3,052,216.57
5. Step 5: Solve for x
   x = 3,052,216.57/1,931.85
6. Step 6: Final answer
   x = 1,579.94