Finding the Fourth Proportional to 28,384.08, 42,563.32 and 8,665.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,384.08 : 42,563.32 = 8,665.04 : x
2. Step 2: Convert to fraction form
   28,384.08/42,563.32 = 8,665.04/x
3. Step 3: Cross multiply
   28,384.08x = 42,563.32 × 8,665.04
4. Step 4: Simplify right side
   28,384.08x = 368,812,870.33
5. Step 5: Solve for x
   x = 368,812,870.33/28,384.08
6. Step 6: Final answer
   x = 12,993.65