Finding the Fourth Proportional to 1,335.51, 1,843.17 and 768.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.51 : 1,843.17 = 768.57 : x
2. Step 2: Convert to fraction form
   1,335.51/1,843.17 = 768.57/x
3. Step 3: Cross multiply
   1,335.51x = 1,843.17 × 768.57
4. Step 4: Simplify right side
   1,335.51x = 1,416,605.17
5. Step 5: Solve for x
   x = 1,416,605.17/1,335.51
6. Step 6: Final answer
   x = 1,060.72