Finding the Fourth Proportional to 51,656.50, 71,282.91 and 28,990.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,656.50 : 71,282.91 = 28,990.72 : x
2. Step 2: Convert to fraction form
   51,656.50/71,282.91 = 28,990.72/x
3. Step 3: Cross multiply
   51,656.50x = 71,282.91 × 28,990.72
4. Step 4: Simplify right side
   51,656.50x = 2,066,542,884.60
5. Step 5: Solve for x
   x = 2,066,542,884.60/51,656.50
6. Step 6: Final answer
   x = 40,005.48