Finding the Fourth Proportional to 149,109.30, 205,776.48 and 85,459.38

Step by Step Solution

1. Step 1: Write the proportion equation
   149,109.30 : 205,776.48 = 85,459.38 : x
2. Step 2: Convert to fraction form
   149,109.30/205,776.48 = 85,459.38/x
3. Step 3: Cross multiply
   149,109.30x = 205,776.48 × 85,459.38
4. Step 4: Simplify right side
   149,109.30x = 17,585,530,399.38
5. Step 5: Solve for x
   x = 17,585,530,399.38/149,109.30
6. Step 6: Final answer
   x = 117,937.18