Finding the Fourth Proportional to 1,395.66, 1,925.74 and 898.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.66 : 1,925.74 = 898.18 : x
2. Step 2: Convert to fraction form
   1,395.66/1,925.74 = 898.18/x
3. Step 3: Cross multiply
   1,395.66x = 1,925.74 × 898.18
4. Step 4: Simplify right side
   1,395.66x = 1,729,661.15
5. Step 5: Solve for x
   x = 1,729,661.15/1,395.66
6. Step 6: Final answer
   x = 1,239.31