Finding the Fourth Proportional to 3,775.31, 5,672.53 and 2,389.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,775.31 : 5,672.53 = 2,389.30 : x
2. Step 2: Convert to fraction form
   3,775.31/5,672.53 = 2,389.30/x
3. Step 3: Cross multiply
   3,775.31x = 5,672.53 × 2,389.30
4. Step 4: Simplify right side
   3,775.31x = 13,553,364.73
5. Step 5: Solve for x
   x = 13,553,364.73/3,775.31
6. Step 6: Final answer
   x = 3,590.00