Finding the Fourth Proportional to 1,055.50, 1,456.51 and 635.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.50 : 1,456.51 = 635.88 : x
2. Step 2: Convert to fraction form
   1,055.50/1,456.51 = 635.88/x
3. Step 3: Cross multiply
   1,055.50x = 1,456.51 × 635.88
4. Step 4: Simplify right side
   1,055.50x = 926,165.58
5. Step 5: Solve for x
   x = 926,165.58/1,055.50
6. Step 6: Final answer
   x = 877.47