Finding the Fourth Proportional to 1,929.72, 2,665.08 and 1,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,929.72 : 2,665.08 = 1,231.50 : x
2. Step 2: Convert to fraction form
   1,929.72/2,665.08 = 1,231.50/x
3. Step 3: Cross multiply
   1,929.72x = 2,665.08 × 1,231.50
4. Step 4: Simplify right side
   1,929.72x = 3,282,046.02
5. Step 5: Solve for x
   x = 3,282,046.02/1,929.72
6. Step 6: Final answer
   x = 1,700.79