Finding the Fourth Proportional to 10,518.63, 15,778.79 and 3,498.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,518.63 : 15,778.79 = 3,498.39 : x
2. Step 2: Convert to fraction form
   10,518.63/15,778.79 = 3,498.39/x
3. Step 3: Cross multiply
   10,518.63x = 15,778.79 × 3,498.39
4. Step 4: Simplify right side
   10,518.63x = 55,200,343.66
5. Step 5: Solve for x
   x = 55,200,343.66/10,518.63
6. Step 6: Final answer
   x = 5,247.86