Finding the Fourth Proportional to 1,056.72, 1,458.38 and 637.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.72 : 1,458.38 = 637.27 : x
2. Step 2: Convert to fraction form
   1,056.72/1,458.38 = 637.27/x
3. Step 3: Cross multiply
   1,056.72x = 1,458.38 × 637.27
4. Step 4: Simplify right side
   1,056.72x = 929,381.82
5. Step 5: Solve for x
   x = 929,381.82/1,056.72
6. Step 6: Final answer
   x = 879.50