Finding the Fourth Proportional to 1,278.51, 1,764.27 and 754.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278.51 : 1,764.27 = 754.50 : x
2. Step 2: Convert to fraction form
   1,278.51/1,764.27 = 754.50/x
3. Step 3: Cross multiply
   1,278.51x = 1,764.27 × 754.50
4. Step 4: Simplify right side
   1,278.51x = 1,331,141.72
5. Step 5: Solve for x
   x = 1,331,141.72/1,278.51
6. Step 6: Final answer
   x = 1,041.17