Finding the Fourth Proportional to 2,981.78, 4,475.61 and 2,238.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.78 : 4,475.61 = 2,238.81 : x
2. Step 2: Convert to fraction form
   2,981.78/4,475.61 = 2,238.81/x
3. Step 3: Cross multiply
   2,981.78x = 4,475.61 × 2,238.81
4. Step 4: Simplify right side
   2,981.78x = 10,020,040.42
5. Step 5: Solve for x
   x = 10,020,040.42/2,981.78
6. Step 6: Final answer
   x = 3,360.42