Finding the Fourth Proportional to 2,066.63, 3,098.91 and 660.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.63 : 3,098.91 = 660.86 : x
2. Step 2: Convert to fraction form
   2,066.63/3,098.91 = 660.86/x
3. Step 3: Cross multiply
   2,066.63x = 3,098.91 × 660.86
4. Step 4: Simplify right side
   2,066.63x = 2,047,945.66
5. Step 5: Solve for x
   x = 2,047,945.66/2,066.63
6. Step 6: Final answer
   x = 990.96