Finding the Fourth Proportional to 145,222.72, 217,847.52 and 56,482.96

Step by Step Solution

1. Step 1: Write the proportion equation
   145,222.72 : 217,847.52 = 56,482.96 : x
2. Step 2: Convert to fraction form
   145,222.72/217,847.52 = 56,482.96/x
3. Step 3: Cross multiply
   145,222.72x = 217,847.52 × 56,482.96
4. Step 4: Simplify right side
   145,222.72x = 12,304,672,758.26
5. Step 5: Solve for x
   x = 12,304,672,758.26/145,222.72
6. Step 6: Final answer
   x = 84,729.67