Finding the Fourth Proportional to 1,611.46, 2,397.88 and 1,605.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.46 : 2,397.88 = 1,605.99 : x
2. Step 2: Convert to fraction form
   1,611.46/2,397.88 = 1,605.99/x
3. Step 3: Cross multiply
   1,611.46x = 2,397.88 × 1,605.99
4. Step 4: Simplify right side
   1,611.46x = 3,850,971.30
5. Step 5: Solve for x
   x = 3,850,971.30/1,611.46
6. Step 6: Final answer
   x = 2,389.75