Finding the Fourth Proportional to 3,800.87, 5,672.47 and 3,702.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,800.87 : 5,672.47 = 3,702.45 : x
2. Step 2: Convert to fraction form
   3,800.87/5,672.47 = 3,702.45/x
3. Step 3: Cross multiply
   3,800.87x = 5,672.47 × 3,702.45
4. Step 4: Simplify right side
   3,800.87x = 21,002,027.30
5. Step 5: Solve for x
   x = 21,002,027.30/3,800.87
6. Step 6: Final answer
   x = 5,525.59