Finding the Fourth Proportional to 2,491.87, 3,438.72 and 1,372.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.87 : 3,438.72 = 1,372.91 : x
2. Step 2: Convert to fraction form
   2,491.87/3,438.72 = 1,372.91/x
3. Step 3: Cross multiply
   2,491.87x = 3,438.72 × 1,372.91
4. Step 4: Simplify right side
   2,491.87x = 4,721,054.27
5. Step 5: Solve for x
   x = 4,721,054.27/2,491.87
6. Step 6: Final answer
   x = 1,894.58