Finding the Fourth Proportional to 1,524.86, 2,290.94 and 978.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.86 : 2,290.94 = 978.11 : x
2. Step 2: Convert to fraction form
   1,524.86/2,290.94 = 978.11/x
3. Step 3: Cross multiply
   1,524.86x = 2,290.94 × 978.11
4. Step 4: Simplify right side
   1,524.86x = 2,240,780.71
5. Step 5: Solve for x
   x = 2,240,780.71/1,524.86
6. Step 6: Final answer
   x = 1,469.50