Finding the Fourth Proportional to 10,991.51, 16,487.71 and 3,200.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.51 : 16,487.71 = 3,200.32 : x
2. Step 2: Convert to fraction form
   10,991.51/16,487.71 = 3,200.32/x
3. Step 3: Cross multiply
   10,991.51x = 16,487.71 × 3,200.32
4. Step 4: Simplify right side
   10,991.51x = 52,765,898.85
5. Step 5: Solve for x
   x = 52,765,898.85/10,991.51
6. Step 6: Final answer
   x = 4,800.61