Finding the Fourth Proportional to 2,620.32, 3,613.95 and 1,623.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.32 : 3,613.95 = 1,623.72 : x
2. Step 2: Convert to fraction form
   2,620.32/3,613.95 = 1,623.72/x
3. Step 3: Cross multiply
   2,620.32x = 3,613.95 × 1,623.72
4. Step 4: Simplify right side
   2,620.32x = 5,868,042.89
5. Step 5: Solve for x
   x = 5,868,042.89/2,620.32
6. Step 6: Final answer
   x = 2,239.44