Finding the Fourth Proportional to 51,334.50, 70,841.61 and 28,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,334.50 : 70,841.61 = 28,978.50 : x
2. Step 2: Convert to fraction form
   51,334.50/70,841.61 = 28,978.50/x
3. Step 3: Cross multiply
   51,334.50x = 70,841.61 × 28,978.50
4. Step 4: Simplify right side
   51,334.50x = 2,052,883,595.39
5. Step 5: Solve for x
   x = 2,052,883,595.39/51,334.50
6. Step 6: Final answer
   x = 39,990.33