Finding the Fourth Proportional to 9,819.78, 13,551.03 and 5,570.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,819.78 : 13,551.03 = 5,570.52 : x
2. Step 2: Convert to fraction form
   9,819.78/13,551.03 = 5,570.52/x
3. Step 3: Cross multiply
   9,819.78x = 13,551.03 × 5,570.52
4. Step 4: Simplify right side
   9,819.78x = 75,486,283.64
5. Step 5: Solve for x
   x = 75,486,283.64/9,819.78
6. Step 6: Final answer
   x = 7,687.17