Finding the Fourth Proportional to 1,136.48, 1,568.40 and 670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.48 : 1,568.40 = 670.72 : x
2. Step 2: Convert to fraction form
   1,136.48/1,568.40 = 670.72/x
3. Step 3: Cross multiply
   1,136.48x = 1,568.40 × 670.72
4. Step 4: Simplify right side
   1,136.48x = 1,051,957.25
5. Step 5: Solve for x
   x = 1,051,957.25/1,136.48
6. Step 6: Final answer
   x = 925.63