Finding the Fourth Proportional to 145,162.10, 217,658.39 and 56,311.77

Step by Step Solution

1. Step 1: Write the proportion equation
   145,162.10 : 217,658.39 = 56,311.77 : x
2. Step 2: Convert to fraction form
   145,162.10/217,658.39 = 56,311.77/x
3. Step 3: Cross multiply
   145,162.10x = 217,658.39 × 56,311.77
4. Step 4: Simplify right side
   145,162.10x = 12,256,728,914.69
5. Step 5: Solve for x
   x = 12,256,728,914.69/145,162.10
6. Step 6: Final answer
   x = 84,434.78