Finding the Fourth Proportional to 85,522.72, 128,196.60 and 43,324.60

Step by Step Solution

1. Step 1: Write the proportion equation
   85,522.72 : 128,196.60 = 43,324.60 : x
2. Step 2: Convert to fraction form
   85,522.72/128,196.60 = 43,324.60/x
3. Step 3: Cross multiply
   85,522.72x = 128,196.60 × 43,324.60
4. Step 4: Simplify right side
   85,522.72x = 5,554,066,416.36
5. Step 5: Solve for x
   x = 5,554,066,416.36/85,522.72
6. Step 6: Final answer
   x = 64,942.58