Finding the Fourth Proportional to 1,664.57, 2,499.64 and 1,598.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.57 : 2,499.64 = 1,598.35 : x
2. Step 2: Convert to fraction form
   1,664.57/2,499.64 = 1,598.35/x
3. Step 3: Cross multiply
   1,664.57x = 2,499.64 × 1,598.35
4. Step 4: Simplify right side
   1,664.57x = 3,995,299.59
5. Step 5: Solve for x
   x = 3,995,299.59/1,664.57
6. Step 6: Final answer
   x = 2,400.20