Finding the Fourth Proportional to 1,664.89, 2,493.06 and 1,615.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.89 : 2,493.06 = 1,615.61 : x
2. Step 2: Convert to fraction form
   1,664.89/2,493.06 = 1,615.61/x
3. Step 3: Cross multiply
   1,664.89x = 2,493.06 × 1,615.61
4. Step 4: Simplify right side
   1,664.89x = 4,027,812.84
5. Step 5: Solve for x
   x = 4,027,812.84/1,664.89
6. Step 6: Final answer
   x = 2,419.27