Finding the Fourth Proportional to 145,742.72, 218,593.31 and 45,900.31

Step by Step Solution

1. Step 1: Write the proportion equation
   145,742.72 : 218,593.31 = 45,900.31 : x
2. Step 2: Convert to fraction form
   145,742.72/218,593.31 = 45,900.31/x
3. Step 3: Cross multiply
   145,742.72x = 218,593.31 × 45,900.31
4. Step 4: Simplify right side
   145,742.72x = 10,033,500,578.18
5. Step 5: Solve for x
   x = 10,033,500,578.18/145,742.72
6. Step 6: Final answer
   x = 68,843.93