Finding the Fourth Proportional to 2,407.17, 3,320.91 and 1,621.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.17 : 3,320.91 = 1,621.47 : x
2. Step 2: Convert to fraction form
   2,407.17/3,320.91 = 1,621.47/x
3. Step 3: Cross multiply
   2,407.17x = 3,320.91 × 1,621.47
4. Step 4: Simplify right side
   2,407.17x = 5,384,755.94
5. Step 5: Solve for x
   x = 5,384,755.94/2,407.17
6. Step 6: Final answer
   x = 2,236.97