Finding the Fourth Proportional to 35,105.38, 52,665.13 and 12,918.88

Step by Step Solution

1. Step 1: Write the proportion equation
   35,105.38 : 52,665.13 = 12,918.88 : x
2. Step 2: Convert to fraction form
   35,105.38/52,665.13 = 12,918.88/x
3. Step 3: Cross multiply
   35,105.38x = 52,665.13 × 12,918.88
4. Step 4: Simplify right side
   35,105.38x = 680,374,231.33
5. Step 5: Solve for x
   x = 680,374,231.33/35,105.38
6. Step 6: Final answer
   x = 19,380.91