Finding the Fourth Proportional to 4,710.80, 7,067.16 and 2,978

Step by Step Solution

1. Step 1: Write the proportion equation
   4,710.80 : 7,067.16 = 2,978 : x
2. Step 2: Convert to fraction form
   4,710.80/7,067.16 = 2,978/x
3. Step 3: Cross multiply
   4,710.80x = 7,067.16 × 2,978
4. Step 4: Simplify right side
   4,710.80x = 21,046,002.48
5. Step 5: Solve for x
   x = 21,046,002.48/4,710.80
6. Step 6: Final answer
   x = 4,467.61