Finding the Fourth Proportional to 10,518.88, 15,774.24 and 3,498.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,518.88 : 15,774.24 = 3,498.64 : x
2. Step 2: Convert to fraction form
   10,518.88/15,774.24 = 3,498.64/x
3. Step 3: Cross multiply
   10,518.88x = 15,774.24 × 3,498.64
4. Step 4: Simplify right side
   10,518.88x = 55,188,387.03
5. Step 5: Solve for x
   x = 55,188,387.03/10,518.88
6. Step 6: Final answer
   x = 5,246.60