Finding the Fourth Proportional to 21,499.68, 29,662.40 and 13,004.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,499.68 : 29,662.40 = 13,004.40 : x
2. Step 2: Convert to fraction form
   21,499.68/29,662.40 = 13,004.40/x
3. Step 3: Cross multiply
   21,499.68x = 29,662.40 × 13,004.40
4. Step 4: Simplify right side
   21,499.68x = 385,741,714.56
5. Step 5: Solve for x
   x = 385,741,714.56/21,499.68
6. Step 6: Final answer
   x = 17,941.74