Finding the Fourth Proportional to 51,364.72, 70,835.88 and 39,428.56

Step by Step Solution

1. Step 1: Write the proportion equation
   51,364.72 : 70,835.88 = 39,428.56 : x
2. Step 2: Convert to fraction form
   51,364.72/70,835.88 = 39,428.56/x
3. Step 3: Cross multiply
   51,364.72x = 70,835.88 × 39,428.56
4. Step 4: Simplify right side
   51,364.72x = 2,792,956,744.73
5. Step 5: Solve for x
   x = 2,792,956,744.73/51,364.72
6. Step 6: Final answer
   x = 54,375.00