Finding the Fourth Proportional to 171,906.10, 258,053.55 and 132,637.30

Step by Step Solution

1. Step 1: Write the proportion equation
   171,906.10 : 258,053.55 = 132,637.30 : x
2. Step 2: Convert to fraction form
   171,906.10/258,053.55 = 132,637.30/x
3. Step 3: Cross multiply
   171,906.10x = 258,053.55 × 132,637.30
4. Step 4: Simplify right side
   171,906.10x = 34,227,526,127.42
5. Step 5: Solve for x
   x = 34,227,526,127.42/171,906.10
6. Step 6: Final answer
   x = 199,105.94