Finding the Fourth Proportional to 1,899.99, 2,851.52 and 805.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.99 : 2,851.52 = 805.10 : x
2. Step 2: Convert to fraction form
   1,899.99/2,851.52 = 805.10/x
3. Step 3: Cross multiply
   1,899.99x = 2,851.52 × 805.10
4. Step 4: Simplify right side
   1,899.99x = 2,295,740.47
5. Step 5: Solve for x
   x = 2,295,740.47/1,899.99
6. Step 6: Final answer
   x = 1,208.29