Finding the Fourth Proportional to 1,807.69, 2,709.70 and 712.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.69 : 2,709.70 = 712.83 : x
2. Step 2: Convert to fraction form
   1,807.69/2,709.70 = 712.83/x
3. Step 3: Cross multiply
   1,807.69x = 2,709.70 × 712.83
4. Step 4: Simplify right side
   1,807.69x = 1,931,555.45
5. Step 5: Solve for x
   x = 1,931,555.45/1,807.69
6. Step 6: Final answer
   x = 1,068.52