Finding the Fourth Proportional to 2,365.57, 3,548.78 and 978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,365.57 : 3,548.78 = 978.15 : x
2. Step 2: Convert to fraction form
   2,365.57/3,548.78 = 978.15/x
3. Step 3: Cross multiply
   2,365.57x = 3,548.78 × 978.15
4. Step 4: Simplify right side
   2,365.57x = 3,471,237.93
5. Step 5: Solve for x
   x = 3,471,237.93/2,365.57
6. Step 6: Final answer
   x = 1,467.40