Finding the Fourth Proportional to 1,111.96, 1,670.48 and 804.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.96 : 1,670.48 = 804.72 : x
2. Step 2: Convert to fraction form
   1,111.96/1,670.48 = 804.72/x
3. Step 3: Cross multiply
   1,111.96x = 1,670.48 × 804.72
4. Step 4: Simplify right side
   1,111.96x = 1,344,268.67
5. Step 5: Solve for x
   x = 1,344,268.67/1,111.96
6. Step 6: Final answer
   x = 1,208.92