Finding the Fourth Proportional to 21,402.83, 29,528.72 and 12,443.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,402.83 : 29,528.72 = 12,443.02 : x
2. Step 2: Convert to fraction form
   21,402.83/29,528.72 = 12,443.02/x
3. Step 3: Cross multiply
   21,402.83x = 29,528.72 × 12,443.02
4. Step 4: Simplify right side
   21,402.83x = 367,426,364.16
5. Step 5: Solve for x
   x = 367,426,364.16/21,402.83
6. Step 6: Final answer
   x = 17,167.18