Finding the Fourth Proportional to 42,983.94, 64,459.50 and 16,685.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,983.94 : 64,459.50 = 16,685.28 : x
2. Step 2: Convert to fraction form
   42,983.94/64,459.50 = 16,685.28/x
3. Step 3: Cross multiply
   42,983.94x = 64,459.50 × 16,685.28
4. Step 4: Simplify right side
   42,983.94x = 1,075,524,806.16
5. Step 5: Solve for x
   x = 1,075,524,806.16/42,983.94
6. Step 6: Final answer
   x = 25,021.55