Finding the Fourth Proportional to 2,261.31, 3,392.16 and 800.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.31 : 3,392.16 = 800.47 : x
2. Step 2: Convert to fraction form
   2,261.31/3,392.16 = 800.47/x
3. Step 3: Cross multiply
   2,261.31x = 3,392.16 × 800.47
4. Step 4: Simplify right side
   2,261.31x = 2,715,322.32
5. Step 5: Solve for x
   x = 2,715,322.32/2,261.31
6. Step 6: Final answer
   x = 1,200.78