Finding the Fourth Proportional to 51,490.89, 71,020.72 and 47,255.62

Step by Step Solution

1. Step 1: Write the proportion equation
   51,490.89 : 71,020.72 = 47,255.62 : x
2. Step 2: Convert to fraction form
   51,490.89/71,020.72 = 47,255.62/x
3. Step 3: Cross multiply
   51,490.89x = 71,020.72 × 47,255.62
4. Step 4: Simplify right side
   51,490.89x = 3,356,128,156.45
5. Step 5: Solve for x
   x = 3,356,128,156.45/51,490.89
6. Step 6: Final answer
   x = 65,179.07