Finding the Fourth Proportional to 10,699.40, 16,043.37 and 3,580.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,699.40 : 16,043.37 = 3,580.50 : x
2. Step 2: Convert to fraction form
   10,699.40/16,043.37 = 3,580.50/x
3. Step 3: Cross multiply
   10,699.40x = 16,043.37 × 3,580.50
4. Step 4: Simplify right side
   10,699.40x = 57,443,286.29
5. Step 5: Solve for x
   x = 57,443,286.29/10,699.40
6. Step 6: Final answer
   x = 5,368.83