Finding the Fourth Proportional to 1,131.74, 1,696.42 and 637.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.74 : 1,696.42 = 637.43 : x
2. Step 2: Convert to fraction form
   1,131.74/1,696.42 = 637.43/x
3. Step 3: Cross multiply
   1,131.74x = 1,696.42 × 637.43
4. Step 4: Simplify right side
   1,131.74x = 1,081,345.81
5. Step 5: Solve for x
   x = 1,081,345.81/1,131.74
6. Step 6: Final answer
   x = 955.48