Finding the Fourth Proportional to 2,784.61, 4,173.37 and 1,139.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.61 : 4,173.37 = 1,139.23 : x
2. Step 2: Convert to fraction form
   2,784.61/4,173.37 = 1,139.23/x
3. Step 3: Cross multiply
   2,784.61x = 4,173.37 × 1,139.23
4. Step 4: Simplify right side
   2,784.61x = 4,754,428.31
5. Step 5: Solve for x
   x = 4,754,428.31/2,784.61
6. Step 6: Final answer
   x = 1,707.39