Finding the Fourth Proportional to 1,660.71, 2,291.71 and 914.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,660.71 : 2,291.71 = 914.63 : x
2. Step 2: Convert to fraction form
   1,660.71/2,291.71 = 914.63/x
3. Step 3: Cross multiply
   1,660.71x = 2,291.71 × 914.63
4. Step 4: Simplify right side
   1,660.71x = 2,096,066.72
5. Step 5: Solve for x
   x = 2,096,066.72/1,660.71
6. Step 6: Final answer
   x = 1,262.15