Finding the Fourth Proportional to 117,740, 162,481.20 and 64,748

Step by Step Solution

1. Step 1: Write the proportion equation
   117,740 : 162,481.20 = 64,748 : x
2. Step 2: Convert to fraction form
   117,740/162,481.20 = 64,748/x
3. Step 3: Cross multiply
   117,740x = 162,481.20 × 64,748
4. Step 4: Simplify right side
   117,740x = 10,520,332,737.60
5. Step 5: Solve for x
   x = 10,520,332,737.60/117,740
6. Step 6: Final answer
   x = 89,352.24