Finding the Fourth Proportional to 1,137.31, 1,704.38 and 636.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137.31 : 1,704.38 = 636.53 : x
2. Step 2: Convert to fraction form
   1,137.31/1,704.38 = 636.53/x
3. Step 3: Cross multiply
   1,137.31x = 1,704.38 × 636.53
4. Step 4: Simplify right side
   1,137.31x = 1,084,888.46
5. Step 5: Solve for x
   x = 1,084,888.46/1,137.31
6. Step 6: Final answer
   x = 953.91