Finding the Fourth Proportional to 1,234.47, 1,704.02 and 768.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,234.47 : 1,704.02 = 768.63 : x
2. Step 2: Convert to fraction form
   1,234.47/1,704.02 = 768.63/x
3. Step 3: Cross multiply
   1,234.47x = 1,704.02 × 768.63
4. Step 4: Simplify right side
   1,234.47x = 1,309,760.89
5. Step 5: Solve for x
   x = 1,309,760.89/1,234.47
6. Step 6: Final answer
   x = 1,060.99