Finding the Fourth Proportional to 1,931.70, 2,665.75 and 1,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.70 : 2,665.75 = 1,047.50 : x
2. Step 2: Convert to fraction form
   1,931.70/2,665.75 = 1,047.50/x
3. Step 3: Cross multiply
   1,931.70x = 2,665.75 × 1,047.50
4. Step 4: Simplify right side
   1,931.70x = 2,792,367.89
5. Step 5: Solve for x
   x = 2,792,367.89/1,931.70
6. Step 6: Final answer
   x = 1,445.55