Finding the Fourth Proportional to 1,304.82, 1,800.72 and 781.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,304.82 : 1,800.72 = 781.02 : x
2. Step 2: Convert to fraction form
   1,304.82/1,800.72 = 781.02/x
3. Step 3: Cross multiply
   1,304.82x = 1,800.72 × 781.02
4. Step 4: Simplify right side
   1,304.82x = 1,406,398.33
5. Step 5: Solve for x
   x = 1,406,398.33/1,304.82
6. Step 6: Final answer
   x = 1,077.85