Finding the Fourth Proportional to 1,134.78, 1,566.02 and 637.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,134.78 : 1,566.02 = 637.47 : x
2. Step 2: Convert to fraction form
   1,134.78/1,566.02 = 637.47/x
3. Step 3: Cross multiply
   1,134.78x = 1,566.02 × 637.47
4. Step 4: Simplify right side
   1,134.78x = 998,288.78
5. Step 5: Solve for x
   x = 998,288.78/1,134.78
6. Step 6: Final answer
   x = 879.72