Finding the Fourth Proportional to 2,953.43, 4,429.17 and 978.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,953.43 : 4,429.17 = 978.61 : x
2. Step 2: Convert to fraction form
   2,953.43/4,429.17 = 978.61/x
3. Step 3: Cross multiply
   2,953.43x = 4,429.17 × 978.61
4. Step 4: Simplify right side
   2,953.43x = 4,334,407.91
5. Step 5: Solve for x
   x = 4,334,407.91/2,953.43
6. Step 6: Final answer
   x = 1,467.58