Finding the Fourth Proportional to 3,890.79, 5,807.96 and 3,601.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.79 : 5,807.96 = 3,601.71 : x
2. Step 2: Convert to fraction form
   3,890.79/5,807.96 = 3,601.71/x
3. Step 3: Cross multiply
   3,890.79x = 5,807.96 × 3,601.71
4. Step 4: Simplify right side
   3,890.79x = 20,918,569.60
5. Step 5: Solve for x
   x = 20,918,569.60/3,890.79
6. Step 6: Final answer
   x = 5,376.43