Finding the Fourth Proportional to 145,168.71, 217,766.84 and 56,429.07

Step by Step Solution

1. Step 1: Write the proportion equation
   145,168.71 : 217,766.84 = 56,429.07 : x
2. Step 2: Convert to fraction form
   145,168.71/217,766.84 = 56,429.07/x
3. Step 3: Cross multiply
   145,168.71x = 217,766.84 × 56,429.07
4. Step 4: Simplify right side
   145,168.71x = 12,288,379,975.89
5. Step 5: Solve for x
   x = 12,288,379,975.89/145,168.71
6. Step 6: Final answer
   x = 84,648.96