Finding the Fourth Proportional to 9,105.39, 12,565.40 and 5,126.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.39 : 12,565.40 = 5,126.51 : x
2. Step 2: Convert to fraction form
   9,105.39/12,565.40 = 5,126.51/x
3. Step 3: Cross multiply
   9,105.39x = 12,565.40 × 5,126.51
4. Step 4: Simplify right side
   9,105.39x = 64,416,560.29
5. Step 5: Solve for x
   x = 64,416,560.29/9,105.39
6. Step 6: Final answer
   x = 7,074.55