Finding the Fourth Proportional to 9,776.32, 14,658.72 and 3,620.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,776.32 : 14,658.72 = 3,620.80 : x
2. Step 2: Convert to fraction form
   9,776.32/14,658.72 = 3,620.80/x
3. Step 3: Cross multiply
   9,776.32x = 14,658.72 × 3,620.80
4. Step 4: Simplify right side
   9,776.32x = 53,076,293.38
5. Step 5: Solve for x
   x = 53,076,293.38/9,776.32
6. Step 6: Final answer
   x = 5,429.07