Finding the Fourth Proportional to 13,490.96, 18,620.69 and 9,016.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,490.96 : 18,620.69 = 9,016.52 : x
2. Step 2: Convert to fraction form
   13,490.96/18,620.69 = 9,016.52/x
3. Step 3: Cross multiply
   13,490.96x = 18,620.69 × 9,016.52
4. Step 4: Simplify right side
   13,490.96x = 167,893,685.61
5. Step 5: Solve for x
   x = 167,893,685.61/13,490.96
6. Step 6: Final answer
   x = 12,444.91