Finding the Fourth Proportional to 3,630.72, 5,444.64 and 1,900.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,630.72 : 5,444.64 = 1,900.80 : x
2. Step 2: Convert to fraction form
   3,630.72/5,444.64 = 1,900.80/x
3. Step 3: Cross multiply
   3,630.72x = 5,444.64 × 1,900.80
4. Step 4: Simplify right side
   3,630.72x = 10,349,171.71
5. Step 5: Solve for x
   x = 10,349,171.71/3,630.72
6. Step 6: Final answer
   x = 2,850.45