Finding the Fourth Proportional to 2,631.24, 3,947.54 and 782.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.24 : 3,947.54 = 782.34 : x
2. Step 2: Convert to fraction form
   2,631.24/3,947.54 = 782.34/x
3. Step 3: Cross multiply
   2,631.24x = 3,947.54 × 782.34
4. Step 4: Simplify right side
   2,631.24x = 3,088,314.53
5. Step 5: Solve for x
   x = 3,088,314.53/2,631.24
6. Step 6: Final answer
   x = 1,173.71