Finding the Fourth Proportional to 10,455.12, 15,678.18 and 3,876.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,455.12 : 15,678.18 = 3,876.48 : x
2. Step 2: Convert to fraction form
   10,455.12/15,678.18 = 3,876.48/x
3. Step 3: Cross multiply
   10,455.12x = 15,678.18 × 3,876.48
4. Step 4: Simplify right side
   10,455.12x = 60,776,151.21
5. Step 5: Solve for x
   x = 60,776,151.21/10,455.12
6. Step 6: Final answer
   x = 5,813.05