Finding the Fourth Proportional to 10,903.59, 16,362.63 and 3,978.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,903.59 : 16,362.63 = 3,978.09 : x
2. Step 2: Convert to fraction form
   10,903.59/16,362.63 = 3,978.09/x
3. Step 3: Cross multiply
   10,903.59x = 16,362.63 × 3,978.09
4. Step 4: Simplify right side
   10,903.59x = 65,092,014.78
5. Step 5: Solve for x
   x = 65,092,014.78/10,903.59
6. Step 6: Final answer
   x = 5,969.78