Finding the Fourth Proportional to 2,631.01, 3,947.13 and 782.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.01 : 3,947.13 = 782.09 : x
2. Step 2: Convert to fraction form
   2,631.01/3,947.13 = 782.09/x
3. Step 3: Cross multiply
   2,631.01x = 3,947.13 × 782.09
4. Step 4: Simplify right side
   2,631.01x = 3,087,010.90
5. Step 5: Solve for x
   x = 3,087,010.90/2,631.01
6. Step 6: Final answer
   x = 1,173.32