Finding the Fourth Proportional to 1,611.36, 2,413.84 and 1,061.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.36 : 2,413.84 = 1,061.88 : x
2. Step 2: Convert to fraction form
   1,611.36/2,413.84 = 1,061.88/x
3. Step 3: Cross multiply
   1,611.36x = 2,413.84 × 1,061.88
4. Step 4: Simplify right side
   1,611.36x = 2,563,196.71
5. Step 5: Solve for x
   x = 2,563,196.71/1,611.36
6. Step 6: Final answer
   x = 1,590.70