Finding the Fourth Proportional to 1,498.71, 2,249.22 and 978.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.71 : 2,249.22 = 978.57 : x
2. Step 2: Convert to fraction form
   1,498.71/2,249.22 = 978.57/x
3. Step 3: Cross multiply
   1,498.71x = 2,249.22 × 978.57
4. Step 4: Simplify right side
   1,498.71x = 2,201,019.22
5. Step 5: Solve for x
   x = 2,201,019.22/1,498.71
6. Step 6: Final answer
   x = 1,468.61