Finding the Fourth Proportional to 3,443.42, 5,158.62 and 1,978.13

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.42 : 5,158.62 = 1,978.13 : x
2. Step 2: Convert to fraction form
   3,443.42/5,158.62 = 1,978.13/x
3. Step 3: Cross multiply
   3,443.42x = 5,158.62 × 1,978.13
4. Step 4: Simplify right side
   3,443.42x = 10,204,420.98
5. Step 5: Solve for x
   x = 10,204,420.98/3,443.42
6. Step 6: Final answer
   x = 2,963.46