Finding the Fourth Proportional to 4,725.89, 7,087.56 and 1,438.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,725.89 : 7,087.56 = 1,438.10 : x
2. Step 2: Convert to fraction form
   4,725.89/7,087.56 = 1,438.10/x
3. Step 3: Cross multiply
   4,725.89x = 7,087.56 × 1,438.10
4. Step 4: Simplify right side
   4,725.89x = 10,192,620.04
5. Step 5: Solve for x
   x = 10,192,620.04/4,725.89
6. Step 6: Final answer
   x = 2,156.76