Finding the Fourth Proportional to 145,972.29, 218,939.59 and 46,142.56

Step by Step Solution

1. Step 1: Write the proportion equation
   145,972.29 : 218,939.59 = 46,142.56 : x
2. Step 2: Convert to fraction form
   145,972.29/218,939.59 = 46,142.56/x
3. Step 3: Cross multiply
   145,972.29x = 218,939.59 × 46,142.56
4. Step 4: Simplify right side
   145,972.29x = 10,102,433,499.30
5. Step 5: Solve for x
   x = 10,102,433,499.30/145,972.29
6. Step 6: Final answer
   x = 69,207.88