Finding the Fourth Proportional to 3,812.13, 5,264.85 and 2,620.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,812.13 : 5,264.85 = 2,620.25 : x
2. Step 2: Convert to fraction form
   3,812.13/5,264.85 = 2,620.25/x
3. Step 3: Cross multiply
   3,812.13x = 5,264.85 × 2,620.25
4. Step 4: Simplify right side
   3,812.13x = 13,795,196.89
5. Step 5: Solve for x
   x = 13,795,196.89/3,812.13
6. Step 6: Final answer
   x = 3,618.76