Finding the Fourth Proportional to 1,665.96, 2,485.47 and 1,499.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.96 : 2,485.47 = 1,499.90 : x
2. Step 2: Convert to fraction form
   1,665.96/2,485.47 = 1,499.90/x
3. Step 3: Cross multiply
   1,665.96x = 2,485.47 × 1,499.90
4. Step 4: Simplify right side
   1,665.96x = 3,727,944.03
5. Step 5: Solve for x
   x = 3,727,944.03/1,665.96
6. Step 6: Final answer
   x = 2,237.72