Finding the Fourth Proportional to 13,022.78, 17,971.31 and 7,054.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,022.78 : 17,971.31 = 7,054.10 : x
2. Step 2: Convert to fraction form
   13,022.78/17,971.31 = 7,054.10/x
3. Step 3: Cross multiply
   13,022.78x = 17,971.31 × 7,054.10
4. Step 4: Simplify right side
   13,022.78x = 126,771,292.74
5. Step 5: Solve for x
   x = 126,771,292.74/13,022.78
6. Step 6: Final answer
   x = 9,734.58