Finding the Fourth Proportional to 145,536.52, 200,839.60 and 81,874.72

Step by Step Solution

1. Step 1: Write the proportion equation
   145,536.52 : 200,839.60 = 81,874.72 : x
2. Step 2: Convert to fraction form
   145,536.52/200,839.60 = 81,874.72/x
3. Step 3: Cross multiply
   145,536.52x = 200,839.60 × 81,874.72
4. Step 4: Simplify right side
   145,536.52x = 16,443,686,014.91
5. Step 5: Solve for x
   x = 16,443,686,014.91/145,536.52
6. Step 6: Final answer
   x = 112,986.66