Finding the Fourth Proportional to 14,042.16, 21,069.72 and 7,021.89

Step by Step Solution

1. Step 1: Write the proportion equation
   14,042.16 : 21,069.72 = 7,021.89 : x
2. Step 2: Convert to fraction form
   14,042.16/21,069.72 = 7,021.89/x
3. Step 3: Cross multiply
   14,042.16x = 21,069.72 × 7,021.89
4. Step 4: Simplify right side
   14,042.16x = 147,949,256.17
5. Step 5: Solve for x
   x = 147,949,256.17/14,042.16
6. Step 6: Final answer
   x = 10,536.08