Finding the Fourth Proportional to 2,450.98, 3,382.18 and 1,388.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,450.98 : 3,382.18 = 1,388.77 : x
2. Step 2: Convert to fraction form
   2,450.98/3,382.18 = 1,388.77/x
3. Step 3: Cross multiply
   2,450.98x = 3,382.18 × 1,388.77
4. Step 4: Simplify right side
   2,450.98x = 4,697,071.61
5. Step 5: Solve for x
   x = 4,697,071.61/2,450.98
6. Step 6: Final answer
   x = 1,916.40