Finding the Fourth Proportional to 108,417.30, 162,395.55 and 89,985.30

Step by Step Solution

1. Step 1: Write the proportion equation
   108,417.30 : 162,395.55 = 89,985.30 : x
2. Step 2: Convert to fraction form
   108,417.30/162,395.55 = 89,985.30/x
3. Step 3: Cross multiply
   108,417.30x = 162,395.55 × 89,985.30
4. Step 4: Simplify right side
   108,417.30x = 14,613,212,285.42
5. Step 5: Solve for x
   x = 14,613,212,285.42/108,417.30
6. Step 6: Final answer
   x = 134,786.72