Finding the Fourth Proportional to 1,498.91, 2,069.15 and 909.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.91 : 2,069.15 = 909.63 : x
2. Step 2: Convert to fraction form
   1,498.91/2,069.15 = 909.63/x
3. Step 3: Cross multiply
   1,498.91x = 2,069.15 × 909.63
4. Step 4: Simplify right side
   1,498.91x = 1,882,156.37
5. Step 5: Solve for x
   x = 1,882,156.37/1,498.91
6. Step 6: Final answer
   x = 1,255.69