Finding the Fourth Proportional to 2,709.47, 4,064.31 and 761.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.47 : 4,064.31 = 761.63 : x
2. Step 2: Convert to fraction form
   2,709.47/4,064.31 = 761.63/x
3. Step 3: Cross multiply
   2,709.47x = 4,064.31 × 761.63
4. Step 4: Simplify right side
   2,709.47x = 3,095,480.10
5. Step 5: Solve for x
   x = 3,095,480.10/2,709.47
6. Step 6: Final answer
   x = 1,142.47