Finding the Fourth Proportional to 117,443.48, 162,072.45 and 63,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,443.48 : 162,072.45 = 63,728.50 : x
2. Step 2: Convert to fraction form
   117,443.48/162,072.45 = 63,728.50/x
3. Step 3: Cross multiply
   117,443.48x = 162,072.45 × 63,728.50
4. Step 4: Simplify right side
   117,443.48x = 10,328,633,415.87
5. Step 5: Solve for x
   x = 10,328,633,415.87/117,443.48
6. Step 6: Final answer
   x = 87,945.57