Finding the Fourth Proportional to 9,663.90, 14,491.59 and 4,986.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,663.90 : 14,491.59 = 4,986.55 : x
2. Step 2: Convert to fraction form
   9,663.90/14,491.59 = 4,986.55/x
3. Step 3: Cross multiply
   9,663.90x = 14,491.59 × 4,986.55
4. Step 4: Simplify right side
   9,663.90x = 72,263,038.11
5. Step 5: Solve for x
   x = 72,263,038.11/9,663.90
6. Step 6: Final answer
   x = 7,477.63