Finding the Fourth Proportional to 117,890.37, 162,688.72 and 64,175.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,890.37 : 162,688.72 = 64,175.78 : x
2. Step 2: Convert to fraction form
   117,890.37/162,688.72 = 64,175.78/x
3. Step 3: Cross multiply
   117,890.37x = 162,688.72 × 64,175.78
4. Step 4: Simplify right side
   117,890.37x = 10,440,675,503.20
5. Step 5: Solve for x
   x = 10,440,675,503.20/117,890.37
6. Step 6: Final answer
   x = 88,562.58