Finding the Fourth Proportional to 145,034.15, 200,143.99 and 80,499.60

Step by Step Solution

1. Step 1: Write the proportion equation
   145,034.15 : 200,143.99 = 80,499.60 : x
2. Step 2: Convert to fraction form
   145,034.15/200,143.99 = 80,499.60/x
3. Step 3: Cross multiply
   145,034.15x = 200,143.99 × 80,499.60
4. Step 4: Simplify right side
   145,034.15x = 16,111,510,448.72
5. Step 5: Solve for x
   x = 16,111,510,448.72/145,034.15
6. Step 6: Final answer
   x = 111,087.71