Finding the Fourth Proportional to 165,142.72, 227,898.12 and 89,691.22

Step by Step Solution

1. Step 1: Write the proportion equation
   165,142.72 : 227,898.12 = 89,691.22 : x
2. Step 2: Convert to fraction form
   165,142.72/227,898.12 = 89,691.22/x
3. Step 3: Cross multiply
   165,142.72x = 227,898.12 × 89,691.22
4. Step 4: Simplify right side
   165,142.72x = 20,440,460,418.51
5. Step 5: Solve for x
   x = 20,440,460,418.51/165,142.72
6. Step 6: Final answer
   x = 123,774.52