Finding the Fourth Proportional to 1,979.74, 2,967.72 and 1,054.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,979.74 : 2,967.72 = 1,054.72 : x
2. Step 2: Convert to fraction form
   1,979.74/2,967.72 = 1,054.72/x
3. Step 3: Cross multiply
   1,979.74x = 2,967.72 × 1,054.72
4. Step 4: Simplify right side
   1,979.74x = 3,130,113.64
5. Step 5: Solve for x
   x = 3,130,113.64/1,979.74
6. Step 6: Final answer
   x = 1,581.07