Finding the Fourth Proportional to 1,396.32, 1,926.93 and 872.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.32 : 1,926.93 = 872.25 : x
2. Step 2: Convert to fraction form
   1,396.32/1,926.93 = 872.25/x
3. Step 3: Cross multiply
   1,396.32x = 1,926.93 × 872.25
4. Step 4: Simplify right side
   1,396.32x = 1,680,764.69
5. Step 5: Solve for x
   x = 1,680,764.69/1,396.32
6. Step 6: Final answer
   x = 1,203.71