Finding the Fourth Proportional to 21,045.25, 29,016.18 and 13,479.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,045.25 : 29,016.18 = 13,479.14 : x
2. Step 2: Convert to fraction form
   21,045.25/29,016.18 = 13,479.14/x
3. Step 3: Cross multiply
   21,045.25x = 29,016.18 × 13,479.14
4. Step 4: Simplify right side
   21,045.25x = 391,113,152.49
5. Step 5: Solve for x
   x = 391,113,152.49/21,045.25
6. Step 6: Final answer
   x = 18,584.39