Finding the Fourth Proportional to 1,089.42, 1,502.61 and 983.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.42 : 1,502.61 = 983.82 : x
2. Step 2: Convert to fraction form
   1,089.42/1,502.61 = 983.82/x
3. Step 3: Cross multiply
   1,089.42x = 1,502.61 × 983.82
4. Step 4: Simplify right side
   1,089.42x = 1,478,297.77
5. Step 5: Solve for x
   x = 1,478,297.77/1,089.42
6. Step 6: Final answer
   x = 1,356.96