Finding the Fourth Proportional to 1,396.53, 1,926.72 and 807.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.53 : 1,926.72 = 807.03 : x
2. Step 2: Convert to fraction form
   1,396.53/1,926.72 = 807.03/x
3. Step 3: Cross multiply
   1,396.53x = 1,926.72 × 807.03
4. Step 4: Simplify right side
   1,396.53x = 1,554,920.84
5. Step 5: Solve for x
   x = 1,554,920.84/1,396.53
6. Step 6: Final answer
   x = 1,113.42