Finding the Fourth Proportional to 28,401.34, 42,570.14 and 9,663.88

Step by Step Solution

1. Step 1: Write the proportion equation
   28,401.34 : 42,570.14 = 9,663.88 : x
2. Step 2: Convert to fraction form
   28,401.34/42,570.14 = 9,663.88/x
3. Step 3: Cross multiply
   28,401.34x = 42,570.14 × 9,663.88
4. Step 4: Simplify right side
   28,401.34x = 411,392,724.54
5. Step 5: Solve for x
   x = 411,392,724.54/28,401.34
6. Step 6: Final answer
   x = 14,484.98