Finding the Fourth Proportional to 11,015.98, 16,521.54 and 3,618.45

Step by Step Solution

1. Step 1: Write the proportion equation
   11,015.98 : 16,521.54 = 3,618.45 : x
2. Step 2: Convert to fraction form
   11,015.98/16,521.54 = 3,618.45/x
3. Step 3: Cross multiply
   11,015.98x = 16,521.54 × 3,618.45
4. Step 4: Simplify right side
   11,015.98x = 59,782,352.84
5. Step 5: Solve for x
   x = 59,782,352.84/11,015.98
6. Step 6: Final answer
   x = 5,426.88