Finding the Fourth Proportional to 1,395.21, 1,927.84 and 1,098.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.21 : 1,927.84 = 1,098.81 : x
2. Step 2: Convert to fraction form
   1,395.21/1,927.84 = 1,098.81/x
3. Step 3: Cross multiply
   1,395.21x = 1,927.84 × 1,098.81
4. Step 4: Simplify right side
   1,395.21x = 2,118,334.69
5. Step 5: Solve for x
   x = 2,118,334.69/1,395.21
6. Step 6: Final answer
   x = 1,518.29