Finding the Fourth Proportional to 9,984.84, 13,779.41 and 5,508.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,984.84 : 13,779.41 = 5,508.78 : x
2. Step 2: Convert to fraction form
   9,984.84/13,779.41 = 5,508.78/x
3. Step 3: Cross multiply
   9,984.84x = 13,779.41 × 5,508.78
4. Step 4: Simplify right side
   9,984.84x = 75,907,738.22
5. Step 5: Solve for x
   x = 75,907,738.22/9,984.84
6. Step 6: Final answer
   x = 7,602.30