Finding the Fourth Proportional to 2,276.68, 3,415.54 and 978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.68 : 3,415.54 = 978.52 : x
2. Step 2: Convert to fraction form
   2,276.68/3,415.54 = 978.52/x
3. Step 3: Cross multiply
   2,276.68x = 3,415.54 × 978.52
4. Step 4: Simplify right side
   2,276.68x = 3,342,174.20
5. Step 5: Solve for x
   x = 3,342,174.20/2,276.68
6. Step 6: Final answer
   x = 1,468.00