Finding the Fourth Proportional to 12,300.08, 18,446.18 and 3,978.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.08 : 18,446.18 = 3,978.32 : x
2. Step 2: Convert to fraction form
   12,300.08/18,446.18 = 3,978.32/x
3. Step 3: Cross multiply
   12,300.08x = 18,446.18 × 3,978.32
4. Step 4: Simplify right side
   12,300.08x = 73,384,806.82
5. Step 5: Solve for x
   x = 73,384,806.82/12,300.08
6. Step 6: Final answer
   x = 5,966.21