Finding the Fourth Proportional to 6,609.06, 9,858.51 and 5,978.48

Step by Step Solution

1. Step 1: Write the proportion equation
   6,609.06 : 9,858.51 = 5,978.48 : x
2. Step 2: Convert to fraction form
   6,609.06/9,858.51 = 5,978.48/x
3. Step 3: Cross multiply
   6,609.06x = 9,858.51 × 5,978.48
4. Step 4: Simplify right side
   6,609.06x = 58,938,855.57
5. Step 5: Solve for x
   x = 58,938,855.57/6,609.06
6. Step 6: Final answer
   x = 8,917.89