Finding the Fourth Proportional to 2,500.61, 3,450.78 and 1,381.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.61 : 3,450.78 = 1,381.50 : x
2. Step 2: Convert to fraction form
   2,500.61/3,450.78 = 1,381.50/x
3. Step 3: Cross multiply
   2,500.61x = 3,450.78 × 1,381.50
4. Step 4: Simplify right side
   2,500.61x = 4,767,252.57
5. Step 5: Solve for x
   x = 4,767,252.57/2,500.61
6. Step 6: Final answer
   x = 1,906.44