Finding the Fourth Proportional to 2,491.31, 3,437.98 and 1,372.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.31 : 3,437.98 = 1,372.23 : x
2. Step 2: Convert to fraction form
   2,491.31/3,437.98 = 1,372.23/x
3. Step 3: Cross multiply
   2,491.31x = 3,437.98 × 1,372.23
4. Step 4: Simplify right side
   2,491.31x = 4,717,695.86
5. Step 5: Solve for x
   x = 4,717,695.86/2,491.31
6. Step 6: Final answer
   x = 1,893.66