Finding the Fourth Proportional to 1,259.83, 1,890.56 and 713.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.83 : 1,890.56 = 713.08 : x
2. Step 2: Convert to fraction form
   1,259.83/1,890.56 = 713.08/x
3. Step 3: Cross multiply
   1,259.83x = 1,890.56 × 713.08
4. Step 4: Simplify right side
   1,259.83x = 1,348,120.52
5. Step 5: Solve for x
   x = 1,348,120.52/1,259.83
6. Step 6: Final answer
   x = 1,070.08