Finding the Fourth Proportional to 1,900.16, 2,620.15 and 1,235.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.16 : 2,620.15 = 1,235.78 : x
2. Step 2: Convert to fraction form
   1,900.16/2,620.15 = 1,235.78/x
3. Step 3: Cross multiply
   1,900.16x = 2,620.15 × 1,235.78
4. Step 4: Simplify right side
   1,900.16x = 3,237,912.78
5. Step 5: Solve for x
   x = 3,237,912.78/1,900.16
6. Step 6: Final answer
   x = 1,704.03