Finding the Fourth Proportional to 4,900.96, 7,351.72 and 1,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,900.96 : 7,351.72 = 1,390.69 : x
2. Step 2: Convert to fraction form
   4,900.96/7,351.72 = 1,390.69/x
3. Step 3: Cross multiply
   4,900.96x = 7,351.72 × 1,390.69
4. Step 4: Simplify right side
   4,900.96x = 10,223,974.41
5. Step 5: Solve for x
   x = 10,223,974.41/4,900.96
6. Step 6: Final answer
   x = 2,086.12