Finding the Fourth Proportional to 51,084.76, 70,491.45 and 28,420.15

Step by Step Solution

1. Step 1: Write the proportion equation
   51,084.76 : 70,491.45 = 28,420.15 : x
2. Step 2: Convert to fraction form
   51,084.76/70,491.45 = 28,420.15/x
3. Step 3: Cross multiply
   51,084.76x = 70,491.45 × 28,420.15
4. Step 4: Simplify right side
   51,084.76x = 2,003,377,582.72
5. Step 5: Solve for x
   x = 2,003,377,582.72/51,084.76
6. Step 6: Final answer
   x = 39,216.74