Finding the Fourth Proportional to 1,978.08, 2,968.74 and 1,054.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.08 : 2,968.74 = 1,054.68 : x
2. Step 2: Convert to fraction form
   1,978.08/2,968.74 = 1,054.68/x
3. Step 3: Cross multiply
   1,978.08x = 2,968.74 × 1,054.68
4. Step 4: Simplify right side
   1,978.08x = 3,131,070.70
5. Step 5: Solve for x
   x = 3,131,070.70/1,978.08
6. Step 6: Final answer
   x = 1,582.88