Finding the Fourth Proportional to 20,422.88, 30,612.48 and 10,559.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,422.88 : 30,612.48 = 10,559.52 : x
2. Step 2: Convert to fraction form
   20,422.88/30,612.48 = 10,559.52/x
3. Step 3: Cross multiply
   20,422.88x = 30,612.48 × 10,559.52
4. Step 4: Simplify right side
   20,422.88x = 323,253,094.81
5. Step 5: Solve for x
   x = 323,253,094.81/20,422.88
6. Step 6: Final answer
   x = 15,827.99