Finding the Fourth Proportional to 145,144.33, 217,730.23 and 56,404.68

Step by Step Solution

1. Step 1: Write the proportion equation
   145,144.33 : 217,730.23 = 56,404.68 : x
2. Step 2: Convert to fraction form
   145,144.33/217,730.23 = 56,404.68/x
3. Step 3: Cross multiply
   145,144.33x = 217,730.23 × 56,404.68
4. Step 4: Simplify right side
   145,144.33x = 12,281,002,860.83
5. Step 5: Solve for x
   x = 12,281,002,860.83/145,144.33
6. Step 6: Final answer
   x = 84,612.35