Finding the Fourth Proportional to 117,885.16, 162,681.42 and 64,170.10

Step by Step Solution

1. Step 1: Write the proportion equation
   117,885.16 : 162,681.42 = 64,170.10 : x
2. Step 2: Convert to fraction form
   117,885.16/162,681.42 = 64,170.10/x
3. Step 3: Cross multiply
   117,885.16x = 162,681.42 × 64,170.10
4. Step 4: Simplify right side
   117,885.16x = 10,439,282,989.54
5. Step 5: Solve for x
   x = 10,439,282,989.54/117,885.16
6. Step 6: Final answer
   x = 88,554.68