Finding the Fourth Proportional to 1,294.61, 1,786.61 and 763.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.61 : 1,786.61 = 763.86 : x
2. Step 2: Convert to fraction form
   1,294.61/1,786.61 = 763.86/x
3. Step 3: Cross multiply
   1,294.61x = 1,786.61 × 763.86
4. Step 4: Simplify right side
   1,294.61x = 1,364,721.82
5. Step 5: Solve for x
   x = 1,364,721.82/1,294.61
6. Step 6: Final answer
   x = 1,054.15