Finding the Fourth Proportional to 51,109.50, 70,531.11 and 28,753.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,109.50 : 70,531.11 = 28,753.50 : x
2. Step 2: Convert to fraction form
   51,109.50/70,531.11 = 28,753.50/x
3. Step 3: Cross multiply
   51,109.50x = 70,531.11 × 28,753.50
4. Step 4: Simplify right side
   51,109.50x = 2,028,016,271.39
5. Step 5: Solve for x
   x = 2,028,016,271.39/51,109.50
6. Step 6: Final answer
   x = 39,679.83