Finding the Fourth Proportional to 1,662.12, 2,489.98 and 929.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.12 : 2,489.98 = 929.47 : x
2. Step 2: Convert to fraction form
   1,662.12/2,489.98 = 929.47/x
3. Step 3: Cross multiply
   1,662.12x = 2,489.98 × 929.47
4. Step 4: Simplify right side
   1,662.12x = 2,314,361.71
5. Step 5: Solve for x
   x = 2,314,361.71/1,662.12
6. Step 6: Final answer
   x = 1,392.42