Finding the Fourth Proportional to 2,407.61, 3,611.32 and 1,431.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.61 : 3,611.32 = 1,431.56 : x
2. Step 2: Convert to fraction form
   2,407.61/3,611.32 = 1,431.56/x
3. Step 3: Cross multiply
   2,407.61x = 3,611.32 × 1,431.56
4. Step 4: Simplify right side
   2,407.61x = 5,169,826.71
5. Step 5: Solve for x
   x = 5,169,826.71/2,407.61
6. Step 6: Final answer
   x = 2,147.28