Finding the Fourth Proportional to 1,945.80, 2,919.18 and 713.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.80 : 2,919.18 = 713.88 : x
2. Step 2: Convert to fraction form
   1,945.80/2,919.18 = 713.88/x
3. Step 3: Cross multiply
   1,945.80x = 2,919.18 × 713.88
4. Step 4: Simplify right side
   1,945.80x = 2,083,944.22
5. Step 5: Solve for x
   x = 2,083,944.22/1,945.80
6. Step 6: Final answer
   x = 1,071.00