Finding the Fourth Proportional to 2,491.84, 3,438.72 and 1,372.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.84 : 3,438.72 = 1,372.72 : x
2. Step 2: Convert to fraction form
   2,491.84/3,438.72 = 1,372.72/x
3. Step 3: Cross multiply
   2,491.84x = 3,438.72 × 1,372.72
4. Step 4: Simplify right side
   2,491.84x = 4,720,399.72
5. Step 5: Solve for x
   x = 4,720,399.72/2,491.84
6. Step 6: Final answer
   x = 1,894.34