Finding the Fourth Proportional to 85,771.10, 128,656.96 and 60,735.42

Step by Step Solution

1. Step 1: Write the proportion equation
   85,771.10 : 128,656.96 = 60,735.42 : x
2. Step 2: Convert to fraction form
   85,771.10/128,656.96 = 60,735.42/x
3. Step 3: Cross multiply
   85,771.10x = 128,656.96 × 60,735.42
4. Step 4: Simplify right side
   85,771.10x = 7,814,034,501.52
5. Step 5: Solve for x
   x = 7,814,034,501.52/85,771.10
6. Step 6: Final answer
   x = 91,103.35