Finding the Fourth Proportional to 2,978.10, 4,467.78 and 1,129.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.10 : 4,467.78 = 1,129.18 : x
2. Step 2: Convert to fraction form
   2,978.10/4,467.78 = 1,129.18/x
3. Step 3: Cross multiply
   2,978.10x = 4,467.78 × 1,129.18
4. Step 4: Simplify right side
   2,978.10x = 5,044,927.82
5. Step 5: Solve for x
   x = 5,044,927.82/2,978.10
6. Step 6: Final answer
   x = 1,694.01