Finding the Fourth Proportional to 9,663.47, 13,341.98 and 7,421.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,663.47 : 13,341.98 = 7,421.32 : x
2. Step 2: Convert to fraction form
   9,663.47/13,341.98 = 7,421.32/x
3. Step 3: Cross multiply
   9,663.47x = 13,341.98 × 7,421.32
4. Step 4: Simplify right side
   9,663.47x = 99,014,999.20
5. Step 5: Solve for x
   x = 99,014,999.20/9,663.47
6. Step 6: Final answer
   x = 10,246.32