Finding the Fourth Proportional to 35,910.18, 53,878.23 and 12,540.06

Step by Step Solution

1. Step 1: Write the proportion equation
   35,910.18 : 53,878.23 = 12,540.06 : x
2. Step 2: Convert to fraction form
   35,910.18/53,878.23 = 12,540.06/x
3. Step 3: Cross multiply
   35,910.18x = 53,878.23 × 12,540.06
4. Step 4: Simplify right side
   35,910.18x = 675,636,236.89
5. Step 5: Solve for x
   x = 675,636,236.89/35,910.18
6. Step 6: Final answer
   x = 18,814.62