Finding the Fourth Proportional to 1,389.52, 2,074.01 and 1,225.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.52 : 2,074.01 = 1,225.54 : x
2. Step 2: Convert to fraction form
   1,389.52/2,074.01 = 1,225.54/x
3. Step 3: Cross multiply
   1,389.52x = 2,074.01 × 1,225.54
4. Step 4: Simplify right side
   1,389.52x = 2,541,782.22
5. Step 5: Solve for x
   x = 2,541,782.22/1,389.52
6. Step 6: Final answer
   x = 1,829.25