Finding the Fourth Proportional to 40,105.84, 60,164.60 and 12,406

Step by Step Solution

1. Step 1: Write the proportion equation
   40,105.84 : 60,164.60 = 12,406 : x
2. Step 2: Convert to fraction form
   40,105.84/60,164.60 = 12,406/x
3. Step 3: Cross multiply
   40,105.84x = 60,164.60 × 12,406
4. Step 4: Simplify right side
   40,105.84x = 746,402,027.60
5. Step 5: Solve for x
   x = 746,402,027.60/40,105.84
6. Step 6: Final answer
   x = 18,610.81