Finding the Fourth Proportional to 1,525.05, 2,291.22 and 978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.05 : 2,291.22 = 978.30 : x
2. Step 2: Convert to fraction form
   1,525.05/2,291.22 = 978.30/x
3. Step 3: Cross multiply
   1,525.05x = 2,291.22 × 978.30
4. Step 4: Simplify right side
   1,525.05x = 2,241,500.53
5. Step 5: Solve for x
   x = 2,241,500.53/1,525.05
6. Step 6: Final answer
   x = 1,469.79