Finding the Fourth Proportional to 9,290.29, 12,819.76 and 5,512.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.29 : 12,819.76 = 5,512.81 : x
2. Step 2: Convert to fraction form
   9,290.29/12,819.76 = 5,512.81/x
3. Step 3: Cross multiply
   9,290.29x = 12,819.76 × 5,512.81
4. Step 4: Simplify right side
   9,290.29x = 70,672,809.46
5. Step 5: Solve for x
   x = 70,672,809.46/9,290.29
6. Step 6: Final answer
   x = 7,607.17