Finding the Fourth Proportional to 2,938.47, 4,384.20 and 2,799.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,938.47 : 4,384.20 = 2,799.15 : x
2. Step 2: Convert to fraction form
   2,938.47/4,384.20 = 2,799.15/x
3. Step 3: Cross multiply
   2,938.47x = 4,384.20 × 2,799.15
4. Step 4: Simplify right side
   2,938.47x = 12,272,033.43
5. Step 5: Solve for x
   x = 12,272,033.43/2,938.47
6. Step 6: Final answer
   x = 4,176.33