Finding the Fourth Proportional to 2,054.52, 3,079.71 and 666.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.52 : 3,079.71 = 666.81 : x
2. Step 2: Convert to fraction form
   2,054.52/3,079.71 = 666.81/x
3. Step 3: Cross multiply
   2,054.52x = 3,079.71 × 666.81
4. Step 4: Simplify right side
   2,054.52x = 2,053,581.43
5. Step 5: Solve for x
   x = 2,053,581.43/2,054.52
6. Step 6: Final answer
   x = 999.54