Finding the Fourth Proportional to 1,899.05, 2,621.93 and 1,227.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.05 : 2,621.93 = 1,227.15 : x
2. Step 2: Convert to fraction form
   1,899.05/2,621.93 = 1,227.15/x
3. Step 3: Cross multiply
   1,899.05x = 2,621.93 × 1,227.15
4. Step 4: Simplify right side
   1,899.05x = 3,217,504.47
5. Step 5: Solve for x
   x = 3,217,504.47/1,899.05
6. Step 6: Final answer
   x = 1,694.28