Finding the Fourth Proportional to 10,498.45, 15,749.89 and 3,478.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,498.45 : 15,749.89 = 3,478.06 : x
2. Step 2: Convert to fraction form
   10,498.45/15,749.89 = 3,478.06/x
3. Step 3: Cross multiply
   10,498.45x = 15,749.89 × 3,478.06
4. Step 4: Simplify right side
   10,498.45x = 54,779,137.27
5. Step 5: Solve for x
   x = 54,779,137.27/10,498.45
6. Step 6: Final answer
   x = 5,217.83