Finding the Fourth Proportional to 51,348.69, 70,857.77 and 28,991.25

Step by Step Solution

1. Step 1: Write the proportion equation
   51,348.69 : 70,857.77 = 28,991.25 : x
2. Step 2: Convert to fraction form
   51,348.69/70,857.77 = 28,991.25/x
3. Step 3: Cross multiply
   51,348.69x = 70,857.77 × 28,991.25
4. Step 4: Simplify right side
   51,348.69x = 2,054,255,179.56
5. Step 5: Solve for x
   x = 2,054,255,179.56/51,348.69
6. Step 6: Final answer
   x = 40,005.99