Finding the Fourth Proportional to 145,662.72, 218,535.12 and 131,782.56

Step by Step Solution

1. Step 1: Write the proportion equation
   145,662.72 : 218,535.12 = 131,782.56 : x
2. Step 2: Convert to fraction form
   145,662.72/218,535.12 = 131,782.56/x
3. Step 3: Cross multiply
   145,662.72x = 218,535.12 × 131,782.56
4. Step 4: Simplify right side
   145,662.72x = 28,799,117,563.51
5. Step 5: Solve for x
   x = 28,799,117,563.51/145,662.72
6. Step 6: Final answer
   x = 197,710.97