Finding the Fourth Proportional to 1,395.57, 1,925.25 and 898.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.57 : 1,925.25 = 898.04 : x
2. Step 2: Convert to fraction form
   1,395.57/1,925.25 = 898.04/x
3. Step 3: Cross multiply
   1,395.57x = 1,925.25 × 898.04
4. Step 4: Simplify right side
   1,395.57x = 1,728,941.88
5. Step 5: Solve for x
   x = 1,728,941.88/1,395.57
6. Step 6: Final answer
   x = 1,238.88