Finding the Fourth Proportional to 11,298.78, 16,947.36 and 3,507.39

Step by Step Solution

1. Step 1: Write the proportion equation
   11,298.78 : 16,947.36 = 3,507.39 : x
2. Step 2: Convert to fraction form
   11,298.78/16,947.36 = 3,507.39/x
3. Step 3: Cross multiply
   11,298.78x = 16,947.36 × 3,507.39
4. Step 4: Simplify right side
   11,298.78x = 59,441,000.99
5. Step 5: Solve for x
   x = 59,441,000.99/11,298.78
6. Step 6: Final answer
   x = 5,260.83