Finding the Fourth Proportional to 10,967.72, 16,451.60 and 4,389.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,967.72 : 16,451.60 = 4,389.30 : x
2. Step 2: Convert to fraction form
   10,967.72/16,451.60 = 4,389.30/x
3. Step 3: Cross multiply
   10,967.72x = 16,451.60 × 4,389.30
4. Step 4: Simplify right side
   10,967.72x = 72,210,985.93
5. Step 5: Solve for x
   x = 72,210,985.93/10,967.72
6. Step 6: Final answer
   x = 6,583.96