Finding the Fourth Proportional to 1,395.15, 1,926.17 and 898.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.15 : 1,926.17 = 898.67 : x
2. Step 2: Convert to fraction form
   1,395.15/1,926.17 = 898.67/x
3. Step 3: Cross multiply
   1,395.15x = 1,926.17 × 898.67
4. Step 4: Simplify right side
   1,395.15x = 1,730,991.52
5. Step 5: Solve for x
   x = 1,730,991.52/1,395.15
6. Step 6: Final answer
   x = 1,240.72