Finding the Fourth Proportional to 1,291.82, 1,783.01 and 768.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.82 : 1,783.01 = 768.15 : x
2. Step 2: Convert to fraction form
   1,291.82/1,783.01 = 768.15/x
3. Step 3: Cross multiply
   1,291.82x = 1,783.01 × 768.15
4. Step 4: Simplify right side
   1,291.82x = 1,369,615.29
5. Step 5: Solve for x
   x = 1,369,615.29/1,291.82
6. Step 6: Final answer
   x = 1,060.23