Finding the Fourth Proportional to 117,854.67, 162,636.33 and 64,138.55

Step by Step Solution

1. Step 1: Write the proportion equation
   117,854.67 : 162,636.33 = 64,138.55 : x
2. Step 2: Convert to fraction form
   117,854.67/162,636.33 = 64,138.55/x
3. Step 3: Cross multiply
   117,854.67x = 162,636.33 × 64,138.55
4. Step 4: Simplify right side
   117,854.67x = 10,431,257,570.34
5. Step 5: Solve for x
   x = 10,431,257,570.34/117,854.67
6. Step 6: Final answer
   x = 88,509.50