Finding the Fourth Proportional to 2,086.74, 3,128.46 and 992.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.74 : 3,128.46 = 992.43 : x
2. Step 2: Convert to fraction form
   2,086.74/3,128.46 = 992.43/x
3. Step 3: Cross multiply
   2,086.74x = 3,128.46 × 992.43
4. Step 4: Simplify right side
   2,086.74x = 3,104,777.56
5. Step 5: Solve for x
   x = 3,104,777.56/2,086.74
6. Step 6: Final answer
   x = 1,487.86