Finding the Fourth Proportional to 3,672.21, 5,061.90 and 2,491.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,672.21 : 5,061.90 = 2,491.23 : x
2. Step 2: Convert to fraction form
   3,672.21/5,061.90 = 2,491.23/x
3. Step 3: Cross multiply
   3,672.21x = 5,061.90 × 2,491.23
4. Step 4: Simplify right side
   3,672.21x = 12,610,357.14
5. Step 5: Solve for x
   x = 12,610,357.14/3,672.21
6. Step 6: Final answer
   x = 3,434.00