Finding the Fourth Proportional to 1,611.76, 2,419.88 and 1,322.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.76 : 2,419.88 = 1,322.32 : x
2. Step 2: Convert to fraction form
   1,611.76/2,419.88 = 1,322.32/x
3. Step 3: Cross multiply
   1,611.76x = 2,419.88 × 1,322.32
4. Step 4: Simplify right side
   1,611.76x = 3,199,855.72
5. Step 5: Solve for x
   x = 3,199,855.72/1,611.76
6. Step 6: Final answer
   x = 1,985.32