Finding the Fourth Proportional to 117,936.72, 162,752.68 and 64,221.72

Step by Step Solution

1. Step 1: Write the proportion equation
   117,936.72 : 162,752.68 = 64,221.72 : x
2. Step 2: Convert to fraction form
   117,936.72/162,752.68 = 64,221.72/x
3. Step 3: Cross multiply
   117,936.72x = 162,752.68 × 64,221.72
4. Step 4: Simplify right side
   117,936.72x = 10,452,257,044.21
5. Step 5: Solve for x
   x = 10,452,257,044.21/117,936.72
6. Step 6: Final answer
   x = 88,625.98