Finding the Fourth Proportional to 9,710.50, 13,400.42 and 5,518.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,710.50 : 13,400.42 = 5,518.74 : x
2. Step 2: Convert to fraction form
   9,710.50/13,400.42 = 5,518.74/x
3. Step 3: Cross multiply
   9,710.50x = 13,400.42 × 5,518.74
4. Step 4: Simplify right side
   9,710.50x = 73,953,433.87
5. Step 5: Solve for x
   x = 73,953,433.87/9,710.50
6. Step 6: Final answer
   x = 7,615.82