Finding the Fourth Proportional to 2,500.40, 3,450.34 and 1,438.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.40 : 3,450.34 = 1,438.11 : x
2. Step 2: Convert to fraction form
   2,500.40/3,450.34 = 1,438.11/x
3. Step 3: Cross multiply
   2,500.40x = 3,450.34 × 1,438.11
4. Step 4: Simplify right side
   2,500.40x = 4,961,947.61
5. Step 5: Solve for x
   x = 4,961,947.61/2,500.40
6. Step 6: Final answer
   x = 1,984.47