Finding the Fourth Proportional to 145,142.37, 217,796.46 and 56,384.31

Step by Step Solution

1. Step 1: Write the proportion equation
   145,142.37 : 217,796.46 = 56,384.31 : x
2. Step 2: Convert to fraction form
   145,142.37/217,796.46 = 56,384.31/x
3. Step 3: Cross multiply
   145,142.37x = 217,796.46 × 56,384.31
4. Step 4: Simplify right side
   145,142.37x = 12,280,303,117.54
5. Step 5: Solve for x
   x = 12,280,303,117.54/145,142.37
6. Step 6: Final answer
   x = 84,608.67