Finding the Fourth Proportional to 2,021.42, 3,031.79 and 560.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.42 : 3,031.79 = 560.72 : x
2. Step 2: Convert to fraction form
   2,021.42/3,031.79 = 560.72/x
3. Step 3: Cross multiply
   2,021.42x = 3,031.79 × 560.72
4. Step 4: Simplify right side
   2,021.42x = 1,699,967.33
5. Step 5: Solve for x
   x = 1,699,967.33/2,021.42
6. Step 6: Final answer
   x = 840.98