Finding the Fourth Proportional to 1,498.81, 2,068.55 and 909.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.81 : 2,068.55 = 909.31 : x
2. Step 2: Convert to fraction form
   1,498.81/2,068.55 = 909.31/x
3. Step 3: Cross multiply
   1,498.81x = 2,068.55 × 909.31
4. Step 4: Simplify right side
   1,498.81x = 1,880,953.20
5. Step 5: Solve for x
   x = 1,880,953.20/1,498.81
6. Step 6: Final answer
   x = 1,254.96