Finding the Fourth Proportional to 1,978.74, 2,967.13 and 1,054.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.74 : 2,967.13 = 1,054.04 : x
2. Step 2: Convert to fraction form
   1,978.74/2,967.13 = 1,054.04/x
3. Step 3: Cross multiply
   1,978.74x = 2,967.13 × 1,054.04
4. Step 4: Simplify right side
   1,978.74x = 3,127,473.71
5. Step 5: Solve for x
   x = 3,127,473.71/1,978.74
6. Step 6: Final answer
   x = 1,580.54