Finding the Fourth Proportional to 2,432.32, 3,645.40 and 1,321.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,432.32 : 3,645.40 = 1,321.69 : x
2. Step 2: Convert to fraction form
   2,432.32/3,645.40 = 1,321.69/x
3. Step 3: Cross multiply
   2,432.32x = 3,645.40 × 1,321.69
4. Step 4: Simplify right side
   2,432.32x = 4,818,081.26
5. Step 5: Solve for x
   x = 4,818,081.26/2,432.32
6. Step 6: Final answer
   x = 1,980.86