Finding the Fourth Proportional to 1,077.69, 1,487.39 and 635.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.69 : 1,487.39 = 635.52 : x
2. Step 2: Convert to fraction form
   1,077.69/1,487.39 = 635.52/x
3. Step 3: Cross multiply
   1,077.69x = 1,487.39 × 635.52
4. Step 4: Simplify right side
   1,077.69x = 945,262.92
5. Step 5: Solve for x
   x = 945,262.92/1,077.69
6. Step 6: Final answer
   x = 877.12