Finding the Fourth Proportional to 1,139.34, 1,700.46 and 1,065.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.34 : 1,700.46 = 1,065.54 : x
2. Step 2: Convert to fraction form
   1,139.34/1,700.46 = 1,065.54/x
3. Step 3: Cross multiply
   1,139.34x = 1,700.46 × 1,065.54
4. Step 4: Simplify right side
   1,139.34x = 1,811,908.15
5. Step 5: Solve for x
   x = 1,811,908.15/1,139.34
6. Step 6: Final answer
   x = 1,590.31