Finding the Fourth Proportional to 10,428.78, 15,641.01 and 3,850.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.78 : 15,641.01 = 3,850.47 : x
2. Step 2: Convert to fraction form
   10,428.78/15,641.01 = 3,850.47/x
3. Step 3: Cross multiply
   10,428.78x = 15,641.01 × 3,850.47
4. Step 4: Simplify right side
   10,428.78x = 60,225,239.77
5. Step 5: Solve for x
   x = 60,225,239.77/10,428.78
6. Step 6: Final answer
   x = 5,774.91