Finding the Fourth Proportional to 1,899.42, 2,855.21 and 1,764.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.42 : 2,855.21 = 1,764.15 : x
2. Step 2: Convert to fraction form
   1,899.42/2,855.21 = 1,764.15/x
3. Step 3: Cross multiply
   1,899.42x = 2,855.21 × 1,764.15
4. Step 4: Simplify right side
   1,899.42x = 5,037,018.72
5. Step 5: Solve for x
   x = 5,037,018.72/1,899.42
6. Step 6: Final answer
   x = 2,651.87