Finding the Fourth Proportional to 1,648.91, 2,472.90 and 1,185.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.91 : 2,472.90 = 1,185.31 : x
2. Step 2: Convert to fraction form
   1,648.91/2,472.90 = 1,185.31/x
3. Step 3: Cross multiply
   1,648.91x = 2,472.90 × 1,185.31
4. Step 4: Simplify right side
   1,648.91x = 2,931,154.79
5. Step 5: Solve for x
   x = 2,931,154.79/1,648.91
6. Step 6: Final answer
   x = 1,777.64