Finding the Fourth Proportional to 1,089.35, 1,502.72 and 940.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.35 : 1,502.72 = 940.59 : x
2. Step 2: Convert to fraction form
   1,089.35/1,502.72 = 940.59/x
3. Step 3: Cross multiply
   1,089.35x = 1,502.72 × 940.59
4. Step 4: Simplify right side
   1,089.35x = 1,413,438.70
5. Step 5: Solve for x
   x = 1,413,438.70/1,089.35
6. Step 6: Final answer
   x = 1,297.50