Finding the Fourth Proportional to 2,686.72, 3,704.88 and 1,900.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.72 : 3,704.88 = 1,900.48 : x
2. Step 2: Convert to fraction form
   2,686.72/3,704.88 = 1,900.48/x
3. Step 3: Cross multiply
   2,686.72x = 3,704.88 × 1,900.48
4. Step 4: Simplify right side
   2,686.72x = 7,041,050.34
5. Step 5: Solve for x
   x = 7,041,050.34/2,686.72
6. Step 6: Final answer
   x = 2,620.69