Finding the Fourth Proportional to 2,452.77, 3,384.81 and 1,390.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.77 : 3,384.81 = 1,390.50 : x
2. Step 2: Convert to fraction form
   2,452.77/3,384.81 = 1,390.50/x
3. Step 3: Cross multiply
   2,452.77x = 3,384.81 × 1,390.50
4. Step 4: Simplify right side
   2,452.77x = 4,706,578.31
5. Step 5: Solve for x
   x = 4,706,578.31/2,452.77
6. Step 6: Final answer
   x = 1,918.88