Finding the Fourth Proportional to 1,353.21, 1,867.62 and 981.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.21 : 1,867.62 = 981.42 : x
2. Step 2: Convert to fraction form
   1,353.21/1,867.62 = 981.42/x
3. Step 3: Cross multiply
   1,353.21x = 1,867.62 × 981.42
4. Step 4: Simplify right side
   1,353.21x = 1,832,919.62
5. Step 5: Solve for x
   x = 1,832,919.62/1,353.21
6. Step 6: Final answer
   x = 1,354.50