Finding the Fourth Proportional to 1,902.42, 2,623.59 and 1,239.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,902.42 : 2,623.59 = 1,239.03 : x
2. Step 2: Convert to fraction form
   1,902.42/2,623.59 = 1,239.03/x
3. Step 3: Cross multiply
   1,902.42x = 2,623.59 × 1,239.03
4. Step 4: Simplify right side
   1,902.42x = 3,250,706.72
5. Step 5: Solve for x
   x = 3,250,706.72/1,902.42
6. Step 6: Final answer
   x = 1,708.72