Finding the Fourth Proportional to 7,418.39, 11,138.72 and 7,061.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,418.39 : 11,138.72 = 7,061.72 : x
2. Step 2: Convert to fraction form
   7,418.39/11,138.72 = 7,061.72/x
3. Step 3: Cross multiply
   7,418.39x = 11,138.72 × 7,061.72
4. Step 4: Simplify right side
   7,418.39x = 78,658,430.80
5. Step 5: Solve for x
   x = 78,658,430.80/7,418.39
6. Step 6: Final answer
   x = 10,603.17