Finding the Fourth Proportional to 21,407.34, 29,532.27 and 13,856.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,407.34 : 29,532.27 = 13,856.10 : x
2. Step 2: Convert to fraction form
   21,407.34/29,532.27 = 13,856.10/x
3. Step 3: Cross multiply
   21,407.34x = 29,532.27 × 13,856.10
4. Step 4: Simplify right side
   21,407.34x = 409,202,063.58
5. Step 5: Solve for x
   x = 409,202,063.58/21,407.34
6. Step 6: Final answer
   x = 19,115.03