Finding the Fourth Proportional to 1,438.96, 1,986.06 and 914.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.96 : 1,986.06 = 914.89 : x
2. Step 2: Convert to fraction form
   1,438.96/1,986.06 = 914.89/x
3. Step 3: Cross multiply
   1,438.96x = 1,986.06 × 914.89
4. Step 4: Simplify right side
   1,438.96x = 1,817,026.43
5. Step 5: Solve for x
   x = 1,817,026.43/1,438.96
6. Step 6: Final answer
   x = 1,262.74