Finding the Fourth Proportional to 9,980.67, 13,772.43 and 5,503.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.67 : 13,772.43 = 5,503.32 : x
2. Step 2: Convert to fraction form
   9,980.67/13,772.43 = 5,503.32/x
3. Step 3: Cross multiply
   9,980.67x = 13,772.43 × 5,503.32
4. Step 4: Simplify right side
   9,980.67x = 75,794,089.47
5. Step 5: Solve for x
   x = 75,794,089.47/9,980.67
6. Step 6: Final answer
   x = 7,594.09