Finding the Fourth Proportional to 12,782.72, 17,635.59 and 7,402.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782.72 : 17,635.59 = 7,402.22 : x
2. Step 2: Convert to fraction form
   12,782.72/17,635.59 = 7,402.22/x
3. Step 3: Cross multiply
   12,782.72x = 17,635.59 × 7,402.22
4. Step 4: Simplify right side
   12,782.72x = 130,542,517.01
5. Step 5: Solve for x
   x = 130,542,517.01/12,782.72
6. Step 6: Final answer
   x = 10,212.42