Finding the Fourth Proportional to 4,938.15, 7,407.32 and 1,428.42

Step by Step Solution

1. Step 1: Write the proportion equation
   4,938.15 : 7,407.32 = 1,428.42 : x
2. Step 2: Convert to fraction form
   4,938.15/7,407.32 = 1,428.42/x
3. Step 3: Cross multiply
   4,938.15x = 7,407.32 × 1,428.42
4. Step 4: Simplify right side
   4,938.15x = 10,580,756.89
5. Step 5: Solve for x
   x = 10,580,756.89/4,938.15
6. Step 6: Final answer
   x = 2,142.66