Finding the Fourth Proportional to 1,082.34, 1,620.27 and 648.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.34 : 1,620.27 = 648.18 : x
2. Step 2: Convert to fraction form
   1,082.34/1,620.27 = 648.18/x
3. Step 3: Cross multiply
   1,082.34x = 1,620.27 × 648.18
4. Step 4: Simplify right side
   1,082.34x = 1,050,226.61
5. Step 5: Solve for x
   x = 1,050,226.61/1,082.34
6. Step 6: Final answer
   x = 970.33