Finding the Fourth Proportional to 21,003.43, 28,998.98 and 14,704.87

Step by Step Solution

1. Step 1: Write the proportion equation
   21,003.43 : 28,998.98 = 14,704.87 : x
2. Step 2: Convert to fraction form
   21,003.43/28,998.98 = 14,704.87/x
3. Step 3: Cross multiply
   21,003.43x = 28,998.98 × 14,704.87
4. Step 4: Simplify right side
   21,003.43x = 426,426,157.51
5. Step 5: Solve for x
   x = 426,426,157.51/21,003.43
6. Step 6: Final answer
   x = 20,302.69