Finding the Fourth Proportional to 1,395.52, 1,926.40 and 871.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.52 : 1,926.40 = 871.80 : x
2. Step 2: Convert to fraction form
   1,395.52/1,926.40 = 871.80/x
3. Step 3: Cross multiply
   1,395.52x = 1,926.40 × 871.80
4. Step 4: Simplify right side
   1,395.52x = 1,679,435.52
5. Step 5: Solve for x
   x = 1,679,435.52/1,395.52
6. Step 6: Final answer
   x = 1,203.45