Finding the Fourth Proportional to 42,980.94, 64,455 and 16,682.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,980.94 : 64,455 = 16,682.28 : x
2. Step 2: Convert to fraction form
   42,980.94/64,455 = 16,682.28/x
3. Step 3: Cross multiply
   42,980.94x = 64,455 × 16,682.28
4. Step 4: Simplify right side
   42,980.94x = 1,075,256,357.40
5. Step 5: Solve for x
   x = 1,075,256,357.40/42,980.94
6. Step 6: Final answer
   x = 25,017.05