Finding the Fourth Proportional to 2,047.82, 3,071.81 and 661.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,047.82 : 3,071.81 = 661.30 : x
2. Step 2: Convert to fraction form
   2,047.82/3,071.81 = 661.30/x
3. Step 3: Cross multiply
   2,047.82x = 3,071.81 × 661.30
4. Step 4: Simplify right side
   2,047.82x = 2,031,387.95
5. Step 5: Solve for x
   x = 2,031,387.95/2,047.82
6. Step 6: Final answer
   x = 991.98