Finding the Fourth Proportional to 2,611.72, 3,604.19 and 1,432.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.72 : 3,604.19 = 1,432.80 : x
2. Step 2: Convert to fraction form
   2,611.72/3,604.19 = 1,432.80/x
3. Step 3: Cross multiply
   2,611.72x = 3,604.19 × 1,432.80
4. Step 4: Simplify right side
   2,611.72x = 5,164,083.43
5. Step 5: Solve for x
   x = 5,164,083.43/2,611.72
6. Step 6: Final answer
   x = 1,977.27