Finding the Fourth Proportional to 10,903.68, 16,357.96 and 3,978.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,903.68 : 16,357.96 = 3,978.18 : x
2. Step 2: Convert to fraction form
   10,903.68/16,357.96 = 3,978.18/x
3. Step 3: Cross multiply
   10,903.68x = 16,357.96 × 3,978.18
4. Step 4: Simplify right side
   10,903.68x = 65,074,909.31
5. Step 5: Solve for x
   x = 65,074,909.31/10,903.68
6. Step 6: Final answer
   x = 5,968.16