Finding the Fourth Proportional to 1,087.86, 1,633.98 and 649.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.86 : 1,633.98 = 649.98 : x
2. Step 2: Convert to fraction form
   1,087.86/1,633.98 = 649.98/x
3. Step 3: Cross multiply
   1,087.86x = 1,633.98 × 649.98
4. Step 4: Simplify right side
   1,087.86x = 1,062,054.32
5. Step 5: Solve for x
   x = 1,062,054.32/1,087.86
6. Step 6: Final answer
   x = 976.28