Finding the Fourth Proportional to 4,851.42, 7,278.38 and 1,388.94

Step by Step Solution

1. Step 1: Write the proportion equation
   4,851.42 : 7,278.38 = 1,388.94 : x
2. Step 2: Convert to fraction form
   4,851.42/7,278.38 = 1,388.94/x
3. Step 3: Cross multiply
   4,851.42x = 7,278.38 × 1,388.94
4. Step 4: Simplify right side
   4,851.42x = 10,109,233.12
5. Step 5: Solve for x
   x = 10,109,233.12/4,851.42
6. Step 6: Final answer
   x = 2,083.77