Finding the Fourth Proportional to 10,991.56, 16,490.13 and 3,200.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.56 : 16,490.13 = 3,200.37 : x
2. Step 2: Convert to fraction form
   10,991.56/16,490.13 = 3,200.37/x
3. Step 3: Cross multiply
   10,991.56x = 16,490.13 × 3,200.37
4. Step 4: Simplify right side
   10,991.56x = 52,774,517.35
5. Step 5: Solve for x
   x = 52,774,517.35/10,991.56
6. Step 6: Final answer
   x = 4,801.37