Finding the Fourth Proportional to 117,854.83, 162,636.53 and 64,138.69

Step by Step Solution

1. Step 1: Write the proportion equation
   117,854.83 : 162,636.53 = 64,138.69 : x
2. Step 2: Convert to fraction form
   117,854.83/162,636.53 = 64,138.69/x
3. Step 3: Cross multiply
   117,854.83x = 162,636.53 × 64,138.69
4. Step 4: Simplify right side
   117,854.83x = 10,431,293,734.10
5. Step 5: Solve for x
   x = 10,431,293,734.10/117,854.83
6. Step 6: Final answer
   x = 88,509.69