Finding the Fourth Proportional to 9,780.20, 13,496.78 and 5,303.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,780.20 : 13,496.78 = 5,303.98 : x
2. Step 2: Convert to fraction form
   9,780.20/13,496.78 = 5,303.98/x
3. Step 3: Cross multiply
   9,780.20x = 13,496.78 × 5,303.98
4. Step 4: Simplify right side
   9,780.20x = 71,586,651.18
5. Step 5: Solve for x
   x = 71,586,651.18/9,780.20
6. Step 6: Final answer
   x = 7,319.55