Finding the Fourth Proportional to 15,385.82, 21,233.97 and 9,421.43

Step by Step Solution

1. Step 1: Write the proportion equation
   15,385.82 : 21,233.97 = 9,421.43 : x
2. Step 2: Convert to fraction form
   15,385.82/21,233.97 = 9,421.43/x
3. Step 3: Cross multiply
   15,385.82x = 21,233.97 × 9,421.43
4. Step 4: Simplify right side
   15,385.82x = 200,054,255.81
5. Step 5: Solve for x
   x = 200,054,255.81/15,385.82
6. Step 6: Final answer
   x = 13,002.51