Finding the Fourth Proportional to 3,123.72, 4,687.20 and 1,827.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.72 : 4,687.20 = 1,827.72 : x
2. Step 2: Convert to fraction form
   3,123.72/4,687.20 = 1,827.72/x
3. Step 3: Cross multiply
   3,123.72x = 4,687.20 × 1,827.72
4. Step 4: Simplify right side
   3,123.72x = 8,566,889.18
5. Step 5: Solve for x
   x = 8,566,889.18/3,123.72
6. Step 6: Final answer
   x = 2,742.53