Finding the Fourth Proportional to 2,712.47, 4,068.75 and 764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,712.47 : 4,068.75 = 764.72 : x
2. Step 2: Convert to fraction form
   2,712.47/4,068.75 = 764.72/x
3. Step 3: Cross multiply
   2,712.47x = 4,068.75 × 764.72
4. Step 4: Simplify right side
   2,712.47x = 3,111,454.50
5. Step 5: Solve for x
   x = 3,111,454.50/2,712.47
6. Step 6: Final answer
   x = 1,147.09