Finding the Fourth Proportional to 1,056.29, 1,456.58 and 636.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.29 : 1,456.58 = 636.56 : x
2. Step 2: Convert to fraction form
   1,056.29/1,456.58 = 636.56/x
3. Step 3: Cross multiply
   1,056.29x = 1,456.58 × 636.56
4. Step 4: Simplify right side
   1,056.29x = 927,200.34
5. Step 5: Solve for x
   x = 927,200.34/1,056.29
6. Step 6: Final answer
   x = 877.79