Finding the Fourth Proportional to 3,980.72, 5,941.86 and 3,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.72 : 5,941.86 = 3,687.50 : x
2. Step 2: Convert to fraction form
   3,980.72/5,941.86 = 3,687.50/x
3. Step 3: Cross multiply
   3,980.72x = 5,941.86 × 3,687.50
4. Step 4: Simplify right side
   3,980.72x = 21,910,608.75
5. Step 5: Solve for x
   x = 21,910,608.75/3,980.72
6. Step 6: Final answer
   x = 5,504.18