Finding the Fourth Proportional to 1,900.72, 2,850.84 and 747.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.72 : 2,850.84 = 747.28 : x
2. Step 2: Convert to fraction form
   1,900.72/2,850.84 = 747.28/x
3. Step 3: Cross multiply
   1,900.72x = 2,850.84 × 747.28
4. Step 4: Simplify right side
   1,900.72x = 2,130,375.72
5. Step 5: Solve for x
   x = 2,130,375.72/1,900.72
6. Step 6: Final answer
   x = 1,120.83