Finding the Fourth Proportional to 1,125.48, 1,686.56 and 636.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,125.48 : 1,686.56 = 636.02 : x
2. Step 2: Convert to fraction form
   1,125.48/1,686.56 = 636.02/x
3. Step 3: Cross multiply
   1,125.48x = 1,686.56 × 636.02
4. Step 4: Simplify right side
   1,125.48x = 1,072,685.89
5. Step 5: Solve for x
   x = 1,072,685.89/1,125.48
6. Step 6: Final answer
   x = 953.09