Finding the Fourth Proportional to 117,728.91, 162,466.29 and 64,013.76

Step by Step Solution

1. Step 1: Write the proportion equation
   117,728.91 : 162,466.29 = 64,013.76 : x
2. Step 2: Convert to fraction form
   117,728.91/162,466.29 = 64,013.76/x
3. Step 3: Cross multiply
   117,728.91x = 162,466.29 × 64,013.76
4. Step 4: Simplify right side
   117,728.91x = 10,400,078,096.15
5. Step 5: Solve for x
   x = 10,400,078,096.15/117,728.91
6. Step 6: Final answer
   x = 88,339.20