Finding the Fourth Proportional to 13,492.31, 20,135.43 and 12,016.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,492.31 : 20,135.43 = 12,016.09 : x
2. Step 2: Convert to fraction form
   13,492.31/20,135.43 = 12,016.09/x
3. Step 3: Cross multiply
   13,492.31x = 20,135.43 × 12,016.09
4. Step 4: Simplify right side
   13,492.31x = 241,948,978.31
5. Step 5: Solve for x
   x = 241,948,978.31/13,492.31
6. Step 6: Final answer
   x = 17,932.36