Finding the Fourth Proportional to 1,899.72, 2,848.90 and 804.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.72 : 2,848.90 = 804.17 : x
2. Step 2: Convert to fraction form
   1,899.72/2,848.90 = 804.17/x
3. Step 3: Cross multiply
   1,899.72x = 2,848.90 × 804.17
4. Step 4: Simplify right side
   1,899.72x = 2,290,999.91
5. Step 5: Solve for x
   x = 2,290,999.91/1,899.72
6. Step 6: Final answer
   x = 1,205.97