Finding the Fourth Proportional to 7,338.90, 10,127.69 and 3,981.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,338.90 : 10,127.69 = 3,981.72 : x
2. Step 2: Convert to fraction form
   7,338.90/10,127.69 = 3,981.72/x
3. Step 3: Cross multiply
   7,338.90x = 10,127.69 × 3,981.72
4. Step 4: Simplify right side
   7,338.90x = 40,325,625.83
5. Step 5: Solve for x
   x = 40,325,625.83/7,338.90
6. Step 6: Final answer
   x = 5,494.78