Finding the Fourth Proportional to 1,607.76, 2,411.82 and 825.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.76 : 2,411.82 = 825.62 : x
2. Step 2: Convert to fraction form
   1,607.76/2,411.82 = 825.62/x
3. Step 3: Cross multiply
   1,607.76x = 2,411.82 × 825.62
4. Step 4: Simplify right side
   1,607.76x = 1,991,234.77
5. Step 5: Solve for x
   x = 1,991,234.77/1,607.76
6. Step 6: Final answer
   x = 1,238.51