Finding the Fourth Proportional to 1,136.71, 1,703.80 and 648.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.71 : 1,703.80 = 648.69 : x
2. Step 2: Convert to fraction form
   1,136.71/1,703.80 = 648.69/x
3. Step 3: Cross multiply
   1,136.71x = 1,703.80 × 648.69
4. Step 4: Simplify right side
   1,136.71x = 1,105,238.02
5. Step 5: Solve for x
   x = 1,105,238.02/1,136.71
6. Step 6: Final answer
   x = 972.31