Finding the Fourth Proportional to 5,800.61, 8,003.51 and 3,915.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,800.61 : 8,003.51 = 3,915.69 : x
2. Step 2: Convert to fraction form
   5,800.61/8,003.51 = 3,915.69/x
3. Step 3: Cross multiply
   5,800.61x = 8,003.51 × 3,915.69
4. Step 4: Simplify right side
   5,800.61x = 31,339,244.49
5. Step 5: Solve for x
   x = 31,339,244.49/5,800.61
6. Step 6: Final answer
   x = 5,402.75