Finding the Fourth Proportional to 1,611, 2,411.91 and 1,061.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611 : 2,411.91 = 1,061.51 : x
2. Step 2: Convert to fraction form
   1,611/2,411.91 = 1,061.51/x
3. Step 3: Cross multiply
   1,611x = 2,411.91 × 1,061.51
4. Step 4: Simplify right side
   1,611x = 2,560,254.52
5. Step 5: Solve for x
   x = 2,560,254.52/1,611
6. Step 6: Final answer
   x = 1,589.23