Finding the Fourth Proportional to 1,611.32, 2,222.80 and 1,052.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.32 : 2,222.80 = 1,052.72 : x
2. Step 2: Convert to fraction form
   1,611.32/2,222.80 = 1,052.72/x
3. Step 3: Cross multiply
   1,611.32x = 2,222.80 × 1,052.72
4. Step 4: Simplify right side
   1,611.32x = 2,339,986.02
5. Step 5: Solve for x
   x = 2,339,986.02/1,611.32
6. Step 6: Final answer
   x = 1,452.22