Finding the Fourth Proportional to 51,065.86, 76,581.78 and 21,478.18

Step by Step Solution

1. Step 1: Write the proportion equation
   51,065.86 : 76,581.78 = 21,478.18 : x
2. Step 2: Convert to fraction form
   51,065.86/76,581.78 = 21,478.18/x
3. Step 3: Cross multiply
   51,065.86x = 76,581.78 × 21,478.18
4. Step 4: Simplify right side
   51,065.86x = 1,644,837,255.56
5. Step 5: Solve for x
   x = 1,644,837,255.56/51,065.86
6. Step 6: Final answer
   x = 32,210.12