Finding the Fourth Proportional to 2,971.69, 4,458.34 and 1,239.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,971.69 : 4,458.34 = 1,239.91 : x
2. Step 2: Convert to fraction form
   2,971.69/4,458.34 = 1,239.91/x
3. Step 3: Cross multiply
   2,971.69x = 4,458.34 × 1,239.91
4. Step 4: Simplify right side
   2,971.69x = 5,527,926.10
5. Step 5: Solve for x
   x = 5,527,926.10/2,971.69
6. Step 6: Final answer
   x = 1,860.20