Finding the Fourth Proportional to 3,788.45, 5,680.05 and 1,938.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.45 : 5,680.05 = 1,938.30 : x
2. Step 2: Convert to fraction form
   3,788.45/5,680.05 = 1,938.30/x
3. Step 3: Cross multiply
   3,788.45x = 5,680.05 × 1,938.30
4. Step 4: Simplify right side
   3,788.45x = 11,009,665.72
5. Step 5: Solve for x
   x = 11,009,665.72/3,788.45
6. Step 6: Final answer
   x = 2,906.12