Finding the Fourth Proportional to 151,851.72, 209,442.12 and 134,644.28

Step by Step Solution

1. Step 1: Write the proportion equation
   151,851.72 : 209,442.12 = 134,644.28 : x
2. Step 2: Convert to fraction form
   151,851.72/209,442.12 = 134,644.28/x
3. Step 3: Cross multiply
   151,851.72x = 209,442.12 × 134,644.28
4. Step 4: Simplify right side
   151,851.72x = 28,200,183,449.07
5. Step 5: Solve for x
   x = 28,200,183,449.07/151,851.72
6. Step 6: Final answer
   x = 185,708.69