Finding the Fourth Proportional to 1,965.39, 2,948.13 and 648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.39 : 2,948.13 = 648.72 : x
2. Step 2: Convert to fraction form
   1,965.39/2,948.13 = 648.72/x
3. Step 3: Cross multiply
   1,965.39x = 2,948.13 × 648.72
4. Step 4: Simplify right side
   1,965.39x = 1,912,510.89
5. Step 5: Solve for x
   x = 1,912,510.89/1,965.39
6. Step 6: Final answer
   x = 973.09