Finding the Fourth Proportional to 1,438.56, 1,984.74 and 914.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.56 : 1,984.74 = 914.52 : x
2. Step 2: Convert to fraction form
   1,438.56/1,984.74 = 914.52/x
3. Step 3: Cross multiply
   1,438.56x = 1,984.74 × 914.52
4. Step 4: Simplify right side
   1,438.56x = 1,815,084.42
5. Step 5: Solve for x
   x = 1,815,084.42/1,438.56
6. Step 6: Final answer
   x = 1,261.74