Finding the Fourth Proportional to 2,971.86, 4,456.17 and 1,239.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,971.86 : 4,456.17 = 1,239.18 : x
2. Step 2: Convert to fraction form
   2,971.86/4,456.17 = 1,239.18/x
3. Step 3: Cross multiply
   2,971.86x = 4,456.17 × 1,239.18
4. Step 4: Simplify right side
   2,971.86x = 5,521,996.74
5. Step 5: Solve for x
   x = 5,521,996.74/2,971.86
6. Step 6: Final answer
   x = 1,858.09