Finding the Fourth Proportional to 117,857.16, 162,642.78 and 64,142.10

Step by Step Solution

1. Step 1: Write the proportion equation
   117,857.16 : 162,642.78 = 64,142.10 : x
2. Step 2: Convert to fraction form
   117,857.16/162,642.78 = 64,142.10/x
3. Step 3: Cross multiply
   117,857.16x = 162,642.78 × 64,142.10
4. Step 4: Simplify right side
   117,857.16x = 10,432,249,459.04
5. Step 5: Solve for x
   x = 10,432,249,459.04/117,857.16
6. Step 6: Final answer
   x = 88,516.04