Finding the Fourth Proportional to 2,939.74, 4,407.59 and 1,089.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,939.74 : 4,407.59 = 1,089.86 : x
2. Step 2: Convert to fraction form
   2,939.74/4,407.59 = 1,089.86/x
3. Step 3: Cross multiply
   2,939.74x = 4,407.59 × 1,089.86
4. Step 4: Simplify right side
   2,939.74x = 4,803,636.72
5. Step 5: Solve for x
   x = 4,803,636.72/2,939.74
6. Step 6: Final answer
   x = 1,634.04