Finding the Fourth Proportional to 1,724.01, 2,587.32 and 1,621.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.01 : 2,587.32 = 1,621.95 : x
2. Step 2: Convert to fraction form
   1,724.01/2,587.32 = 1,621.95/x
3. Step 3: Cross multiply
   1,724.01x = 2,587.32 × 1,621.95
4. Step 4: Simplify right side
   1,724.01x = 4,196,503.67
5. Step 5: Solve for x
   x = 4,196,503.67/1,724.01
6. Step 6: Final answer
   x = 2,434.15