Finding the Fourth Proportional to 63,648, 87,834.72 and 39,788.70

Step by Step Solution

1. Step 1: Write the proportion equation
   63,648 : 87,834.72 = 39,788.70 : x
2. Step 2: Convert to fraction form
   63,648/87,834.72 = 39,788.70/x
3. Step 3: Cross multiply
   63,648x = 87,834.72 × 39,788.70
4. Step 4: Simplify right side
   63,648x = 3,494,829,323.66
5. Step 5: Solve for x
   x = 3,494,829,323.66/63,648
6. Step 6: Final answer
   x = 54,908.71