Finding the Fourth Proportional to 1,520.30, 2,098.01 and 821.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.30 : 2,098.01 = 821.67 : x
2. Step 2: Convert to fraction form
   1,520.30/2,098.01 = 821.67/x
3. Step 3: Cross multiply
   1,520.30x = 2,098.01 × 821.67
4. Step 4: Simplify right side
   1,520.30x = 1,723,877.86
5. Step 5: Solve for x
   x = 1,723,877.86/1,520.30
6. Step 6: Final answer
   x = 1,133.91