Finding the Fourth Proportional to 2,784.58, 4,176.90 and 1,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.58 : 4,176.90 = 1,139.98 : x
2. Step 2: Convert to fraction form
   2,784.58/4,176.90 = 1,139.98/x
3. Step 3: Cross multiply
   2,784.58x = 4,176.90 × 1,139.98
4. Step 4: Simplify right side
   2,784.58x = 4,761,582.46
5. Step 5: Solve for x
   x = 4,761,582.46/2,784.58
6. Step 6: Final answer
   x = 1,709.98