Finding the Fourth Proportional to 85,770.10, 128,655.46 and 60,734.42

Step by Step Solution

1. Step 1: Write the proportion equation
   85,770.10 : 128,655.46 = 60,734.42 : x
2. Step 2: Convert to fraction form
   85,770.10/128,655.46 = 60,734.42/x
3. Step 3: Cross multiply
   85,770.10x = 128,655.46 × 60,734.42
4. Step 4: Simplify right side
   85,770.10x = 7,813,814,658.03
5. Step 5: Solve for x
   x = 7,813,814,658.03/85,770.10
6. Step 6: Final answer
   x = 91,101.85