Finding the Fourth Proportional to 1,698.27, 2,343.39 and 990.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,698.27 : 2,343.39 = 990.34 : x
2. Step 2: Convert to fraction form
   1,698.27/2,343.39 = 990.34/x
3. Step 3: Cross multiply
   1,698.27x = 2,343.39 × 990.34
4. Step 4: Simplify right side
   1,698.27x = 2,320,753.54
5. Step 5: Solve for x
   x = 2,320,753.54/1,698.27
6. Step 6: Final answer
   x = 1,366.54