Finding the Fourth Proportional to 2,021.98, 3,031.48 and 788.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.98 : 3,031.48 = 788.76 : x
2. Step 2: Convert to fraction form
   2,021.98/3,031.48 = 788.76/x
3. Step 3: Cross multiply
   2,021.98x = 3,031.48 × 788.76
4. Step 4: Simplify right side
   2,021.98x = 2,391,110.16
5. Step 5: Solve for x
   x = 2,391,110.16/2,021.98
6. Step 6: Final answer
   x = 1,182.56