Finding the Fourth Proportional to 2,699.60, 4,048.82 and 1,139.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,699.60 : 4,048.82 = 1,139.00 : x
2. Step 2: Convert to fraction form
   2,699.60/4,048.82 = 1,139.00/x
3. Step 3: Cross multiply
   2,699.60x = 4,048.82 × 1,139.00
4. Step 4: Simplify right side
   2,699.60x = 4,611,580.04
5. Step 5: Solve for x
   x = 4,611,580.04/2,699.60
6. Step 6: Final answer
   x = 1,708.25