Finding the Fourth Proportional to 10,967.90, 16,442.63 and 4,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,967.90 : 16,442.63 = 4,390.50 : x
2. Step 2: Convert to fraction form
   10,967.90/16,442.63 = 4,390.50/x
3. Step 3: Cross multiply
   10,967.90x = 16,442.63 × 4,390.50
4. Step 4: Simplify right side
   10,967.90x = 72,191,367.02
5. Step 5: Solve for x
   x = 72,191,367.02/10,967.90
6. Step 6: Final answer
   x = 6,582.06