Finding the Fourth Proportional to 2,276.84, 3,415.47 and 978.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.84 : 3,415.47 = 978.01 : x
2. Step 2: Convert to fraction form
   2,276.84/3,415.47 = 978.01/x
3. Step 3: Cross multiply
   2,276.84x = 3,415.47 × 978.01
4. Step 4: Simplify right side
   2,276.84x = 3,340,341.85
5. Step 5: Solve for x
   x = 3,340,341.85/2,276.84
6. Step 6: Final answer
   x = 1,467.10