Finding the Fourth Proportional to 10,619.54, 15,935.71 and 3,698.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,619.54 : 15,935.71 = 3,698.90 : x
2. Step 2: Convert to fraction form
   10,619.54/15,935.71 = 3,698.90/x
3. Step 3: Cross multiply
   10,619.54x = 15,935.71 × 3,698.90
4. Step 4: Simplify right side
   10,619.54x = 58,944,597.72
5. Step 5: Solve for x
   x = 58,944,597.72/10,619.54
6. Step 6: Final answer
   x = 5,550.58