Finding the Fourth Proportional to 10,300.49, 15,445.20 and 3,278.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,300.49 : 15,445.20 = 3,278.60 : x
2. Step 2: Convert to fraction form
   10,300.49/15,445.20 = 3,278.60/x
3. Step 3: Cross multiply
   10,300.49x = 15,445.20 × 3,278.60
4. Step 4: Simplify right side
   10,300.49x = 50,638,632.72
5. Step 5: Solve for x
   x = 50,638,632.72/10,300.49
6. Step 6: Final answer
   x = 4,916.14