Finding the Fourth Proportional to 3,897.32, 5,842.33 and 1,431.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,897.32 : 5,842.33 = 1,431.47 : x
2. Step 2: Convert to fraction form
   3,897.32/5,842.33 = 1,431.47/x
3. Step 3: Cross multiply
   3,897.32x = 5,842.33 × 1,431.47
4. Step 4: Simplify right side
   3,897.32x = 8,363,131.15
5. Step 5: Solve for x
   x = 8,363,131.15/3,897.32
6. Step 6: Final answer
   x = 2,145.87