Finding the Fourth Proportional to 2,503.89, 3,455.36 and 1,384.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.89 : 3,455.36 = 1,384.91 : x
2. Step 2: Convert to fraction form
   2,503.89/3,455.36 = 1,384.91/x
3. Step 3: Cross multiply
   2,503.89x = 3,455.36 × 1,384.91
4. Step 4: Simplify right side
   2,503.89x = 4,785,338.42
5. Step 5: Solve for x
   x = 4,785,338.42/2,503.89
6. Step 6: Final answer
   x = 1,911.16