Finding the Fourth Proportional to 1,054.99, 1,456.01 and 635.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.99 : 1,456.01 = 635.56 : x
2. Step 2: Convert to fraction form
   1,054.99/1,456.01 = 635.56/x
3. Step 3: Cross multiply
   1,054.99x = 1,456.01 × 635.56
4. Step 4: Simplify right side
   1,054.99x = 925,381.72
5. Step 5: Solve for x
   x = 925,381.72/1,054.99
6. Step 6: Final answer
   x = 877.15