Finding the Fourth Proportional to 1,939.79, 2,910.83 and 707.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.79 : 2,910.83 = 707.18 : x
2. Step 2: Convert to fraction form
   1,939.79/2,910.83 = 707.18/x
3. Step 3: Cross multiply
   1,939.79x = 2,910.83 × 707.18
4. Step 4: Simplify right side
   1,939.79x = 2,058,462.67
5. Step 5: Solve for x
   x = 2,058,462.67/1,939.79
6. Step 6: Final answer
   x = 1,061.18