Finding the Fourth Proportional to 1,498.07, 2,245.32 and 839.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.07 : 2,245.32 = 839.57 : x
2. Step 2: Convert to fraction form
   1,498.07/2,245.32 = 839.57/x
3. Step 3: Cross multiply
   1,498.07x = 2,245.32 × 839.57
4. Step 4: Simplify right side
   1,498.07x = 1,885,092.09
5. Step 5: Solve for x
   x = 1,885,092.09/1,498.07
6. Step 6: Final answer
   x = 1,258.35