Finding the Fourth Proportional to 2,384.38, 3,577.09 and 978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.38 : 3,577.09 = 978.80 : x
2. Step 2: Convert to fraction form
   2,384.38/3,577.09 = 978.80/x
3. Step 3: Cross multiply
   2,384.38x = 3,577.09 × 978.80
4. Step 4: Simplify right side
   2,384.38x = 3,501,250.80
5. Step 5: Solve for x
   x = 3,501,250.80/2,384.38
6. Step 6: Final answer
   x = 1,468.41