Finding the Fourth Proportional to 2,631.52, 3,947.94 and 782.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.52 : 3,947.94 = 782.63 : x
2. Step 2: Convert to fraction form
   2,631.52/3,947.94 = 782.63/x
3. Step 3: Cross multiply
   2,631.52x = 3,947.94 × 782.63
4. Step 4: Simplify right side
   2,631.52x = 3,089,772.37
5. Step 5: Solve for x
   x = 3,089,772.37/2,631.52
6. Step 6: Final answer
   x = 1,174.14