Finding the Fourth Proportional to 145,682.42, 201,038.72 and 81,151.58

Step by Step Solution

1. Step 1: Write the proportion equation
   145,682.42 : 201,038.72 = 81,151.58 : x
2. Step 2: Convert to fraction form
   145,682.42/201,038.72 = 81,151.58/x
3. Step 3: Cross multiply
   145,682.42x = 201,038.72 × 81,151.58
4. Step 4: Simplify right side
   145,682.42x = 16,314,609,769.18
5. Step 5: Solve for x
   x = 16,314,609,769.18/145,682.42
6. Step 6: Final answer
   x = 111,987.50