Finding the Fourth Proportional to 51,219.86, 70,678.25 and 28,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,219.86 : 70,678.25 = 28,556.72 : x
2. Step 2: Convert to fraction form
   51,219.86/70,678.25 = 28,556.72/x
3. Step 3: Cross multiply
   51,219.86x = 70,678.25 × 28,556.72
4. Step 4: Simplify right side
   51,219.86x = 2,018,339,029.25
5. Step 5: Solve for x
   x = 2,018,339,029.25/51,219.86
6. Step 6: Final answer
   x = 39,405.40