Finding the Fourth Proportional to 1,120.82, 1,546.82 and 623.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.82 : 1,546.82 = 623.62 : x
2. Step 2: Convert to fraction form
   1,120.82/1,546.82 = 623.62/x
3. Step 3: Cross multiply
   1,120.82x = 1,546.82 × 623.62
4. Step 4: Simplify right side
   1,120.82x = 964,627.89
5. Step 5: Solve for x
   x = 964,627.89/1,120.82
6. Step 6: Final answer
   x = 860.64