Finding the Fourth Proportional to 1,903.72, 2,622.61 and 1,809.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,903.72 : 2,622.61 = 1,809.91 : x
2. Step 2: Convert to fraction form
   1,903.72/2,622.61 = 1,809.91/x
3. Step 3: Cross multiply
   1,903.72x = 2,622.61 × 1,809.91
4. Step 4: Simplify right side
   1,903.72x = 4,746,689.59
5. Step 5: Solve for x
   x = 4,746,689.59/1,903.72
6. Step 6: Final answer
   x = 2,493.38