Finding the Fourth Proportional to 1,498.86, 2,068.56 and 909.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.86 : 2,068.56 = 909.90 : x
2. Step 2: Convert to fraction form
   1,498.86/2,068.56 = 909.90/x
3. Step 3: Cross multiply
   1,498.86x = 2,068.56 × 909.90
4. Step 4: Simplify right side
   1,498.86x = 1,882,182.74
5. Step 5: Solve for x
   x = 1,882,182.74/1,498.86
6. Step 6: Final answer
   x = 1,255.74