Finding the Fourth Proportional to 3,575.69, 5,363.90 and 978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,575.69 : 5,363.90 = 978.63 : x
2. Step 2: Convert to fraction form
   3,575.69/5,363.90 = 978.63/x
3. Step 3: Cross multiply
   3,575.69x = 5,363.90 × 978.63
4. Step 4: Simplify right side
   3,575.69x = 5,249,273.46
5. Step 5: Solve for x
   x = 5,249,273.46/3,575.69
6. Step 6: Final answer
   x = 1,468.04