Finding the Fourth Proportional to 117,931.96, 162,740.56 and 64,216.81

Step by Step Solution

1. Step 1: Write the proportion equation
   117,931.96 : 162,740.56 = 64,216.81 : x
2. Step 2: Convert to fraction form
   117,931.96/162,740.56 = 64,216.81/x
3. Step 3: Cross multiply
   117,931.96x = 162,740.56 × 64,216.81
4. Step 4: Simplify right side
   117,931.96x = 10,450,679,620.81
5. Step 5: Solve for x
   x = 10,450,679,620.81/117,931.96
6. Step 6: Final answer
   x = 88,616.18