Finding the Fourth Proportional to 34,310.72, 51,423.69 and 20,256.50

Step by Step Solution

1. Step 1: Write the proportion equation
   34,310.72 : 51,423.69 = 20,256.50 : x
2. Step 2: Convert to fraction form
   34,310.72/51,423.69 = 20,256.50/x
3. Step 3: Cross multiply
   34,310.72x = 51,423.69 × 20,256.50
4. Step 4: Simplify right side
   34,310.72x = 1,041,663,976.49
5. Step 5: Solve for x
   x = 1,041,663,976.49/34,310.72
6. Step 6: Final answer
   x = 30,359.72