Finding the Fourth Proportional to 52,278.86, 72,145.20 and 28,405.52

Step by Step Solution

1. Step 1: Write the proportion equation
   52,278.86 : 72,145.20 = 28,405.52 : x
2. Step 2: Convert to fraction form
   52,278.86/72,145.20 = 28,405.52/x
3. Step 3: Cross multiply
   52,278.86x = 72,145.20 × 28,405.52
4. Step 4: Simplify right side
   52,278.86x = 2,049,321,921.50
5. Step 5: Solve for x
   x = 2,049,321,921.50/52,278.86
6. Step 6: Final answer
   x = 39,199.82