Finding the Fourth Proportional to 145,300.72, 200,604.45 and 115,207.60

Step by Step Solution

1. Step 1: Write the proportion equation
   145,300.72 : 200,604.45 = 115,207.60 : x
2. Step 2: Convert to fraction form
   145,300.72/200,604.45 = 115,207.60/x
3. Step 3: Cross multiply
   145,300.72x = 200,604.45 × 115,207.60
4. Step 4: Simplify right side
   145,300.72x = 23,111,157,233.82
5. Step 5: Solve for x
   x = 23,111,157,233.82/145,300.72
6. Step 6: Final answer
   x = 159,057.42