Finding the Fourth Proportional to 8,980.47, 13,485.69 and 5,539.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,980.47 : 13,485.69 = 5,539.59 : x
2. Step 2: Convert to fraction form
   8,980.47/13,485.69 = 5,539.59/x
3. Step 3: Cross multiply
   8,980.47x = 13,485.69 × 5,539.59
4. Step 4: Simplify right side
   8,980.47x = 74,705,193.47
5. Step 5: Solve for x
   x = 74,705,193.47/8,980.47
6. Step 6: Final answer
   x = 8,318.63