Finding the Fourth Proportional to 2,712.89, 4,068.85 and 764.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,712.89 : 4,068.85 = 764.63 : x
2. Step 2: Convert to fraction form
   2,712.89/4,068.85 = 764.63/x
3. Step 3: Cross multiply
   2,712.89x = 4,068.85 × 764.63
4. Step 4: Simplify right side
   2,712.89x = 3,111,164.78
5. Step 5: Solve for x
   x = 3,111,164.78/2,712.89
6. Step 6: Final answer
   x = 1,146.81