Finding the Fourth Proportional to 52,279.58, 72,144.78 and 28,406.43

Step by Step Solution

1. Step 1: Write the proportion equation
   52,279.58 : 72,144.78 = 28,406.43 : x
2. Step 2: Convert to fraction form
   52,279.58/72,144.78 = 28,406.43/x
3. Step 3: Cross multiply
   52,279.58x = 72,144.78 × 28,406.43
4. Step 4: Simplify right side
   52,279.58x = 2,049,375,282.21
5. Step 5: Solve for x
   x = 2,049,375,282.21/52,279.58
6. Step 6: Final answer
   x = 39,200.30