Finding the Fourth Proportional to 9,291.42, 12,819.40 and 5,258.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,291.42 : 12,819.40 = 5,258.03 : x
2. Step 2: Convert to fraction form
   9,291.42/12,819.40 = 5,258.03/x
3. Step 3: Cross multiply
   9,291.42x = 12,819.40 × 5,258.03
4. Step 4: Simplify right side
   9,291.42x = 67,404,712.54
5. Step 5: Solve for x
   x = 67,404,712.54/9,291.42
6. Step 6: Final answer
   x = 7,254.51