Finding the Fourth Proportional to 9,290.37, 12,819.85 and 5,512.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.37 : 12,819.85 = 5,512.88 : x
2. Step 2: Convert to fraction form
   9,290.37/12,819.85 = 5,512.88/x
3. Step 3: Cross multiply
   9,290.37x = 12,819.85 × 5,512.88
4. Step 4: Simplify right side
   9,290.37x = 70,674,343.95
5. Step 5: Solve for x
   x = 70,674,343.95/9,290.37
6. Step 6: Final answer
   x = 7,607.27