Finding the Fourth Proportional to 21,154.34, 29,200.56 and 14,435.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,154.34 : 29,200.56 = 14,435.16 : x
2. Step 2: Convert to fraction form
   21,154.34/29,200.56 = 14,435.16/x
3. Step 3: Cross multiply
   21,154.34x = 29,200.56 × 14,435.16
4. Step 4: Simplify right side
   21,154.34x = 421,514,755.69
5. Step 5: Solve for x
   x = 421,514,755.69/21,154.34
6. Step 6: Final answer
   x = 19,925.69