Finding the Fourth Proportional to 145,806.86, 201,215.94 and 82,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   145,806.86 : 201,215.94 = 82,145.72 : x
2. Step 2: Convert to fraction form
   145,806.86/201,215.94 = 82,145.72/x
3. Step 3: Cross multiply
   145,806.86x = 201,215.94 × 82,145.72
4. Step 4: Simplify right side
   145,806.86x = 16,529,028,266.78
5. Step 5: Solve for x
   x = 16,529,028,266.78/145,806.86
6. Step 6: Final answer
   x = 113,362.49