Finding the Fourth Proportional to 3,469.76, 5,200.12 and 2,645

Step by Step Solution

1. Step 1: Write the proportion equation
   3,469.76 : 5,200.12 = 2,645 : x
2. Step 2: Convert to fraction form
   3,469.76/5,200.12 = 2,645/x
3. Step 3: Cross multiply
   3,469.76x = 5,200.12 × 2,645
4. Step 4: Simplify right side
   3,469.76x = 13,754,317.40
5. Step 5: Solve for x
   x = 13,754,317.40/3,469.76
6. Step 6: Final answer
   x = 3,964.05