Finding the Fourth Proportional to 2,925.50, 4,388.73 and 978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,925.50 : 4,388.73 = 978.17 : x
2. Step 2: Convert to fraction form
   2,925.50/4,388.73 = 978.17/x
3. Step 3: Cross multiply
   2,925.50x = 4,388.73 × 978.17
4. Step 4: Simplify right side
   2,925.50x = 4,292,924.02
5. Step 5: Solve for x
   x = 4,292,924.02/2,925.50
6. Step 6: Final answer
   x = 1,467.42