Finding the Fourth Proportional to 1,055.76, 1,456.38 and 635.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.76 : 1,456.38 = 635.86 : x
2. Step 2: Convert to fraction form
   1,055.76/1,456.38 = 635.86/x
3. Step 3: Cross multiply
   1,055.76x = 1,456.38 × 635.86
4. Step 4: Simplify right side
   1,055.76x = 926,050.61
5. Step 5: Solve for x
   x = 926,050.61/1,055.76
6. Step 6: Final answer
   x = 877.14