Finding the Fourth Proportional to 2,631.56, 3,948.03 and 782.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.56 : 3,948.03 = 782.69 : x
2. Step 2: Convert to fraction form
   2,631.56/3,948.03 = 782.69/x
3. Step 3: Cross multiply
   2,631.56x = 3,948.03 × 782.69
4. Step 4: Simplify right side
   2,631.56x = 3,090,083.60
5. Step 5: Solve for x
   x = 3,090,083.60/2,631.56
6. Step 6: Final answer
   x = 1,174.24