Finding the Fourth Proportional to 2,631.71, 3,945.57 and 1,591.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.71 : 3,945.57 = 1,591.47 : x
2. Step 2: Convert to fraction form
   2,631.71/3,945.57 = 1,591.47/x
3. Step 3: Cross multiply
   2,631.71x = 3,945.57 × 1,591.47
4. Step 4: Simplify right side
   2,631.71x = 6,279,256.29
5. Step 5: Solve for x
   x = 6,279,256.29/2,631.71
6. Step 6: Final answer
   x = 2,386.00