Finding the Fourth Proportional to 3,742.89, 5,612.31 and 3,123.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,742.89 : 5,612.31 = 3,123.24 : x
2. Step 2: Convert to fraction form
   3,742.89/5,612.31 = 3,123.24/x
3. Step 3: Cross multiply
   3,742.89x = 5,612.31 × 3,123.24
4. Step 4: Simplify right side
   3,742.89x = 17,528,591.08
5. Step 5: Solve for x
   x = 17,528,591.08/3,742.89
6. Step 6: Final answer
   x = 4,683.17