Finding the Fourth Proportional to 42,988.62, 64,466.56 and 16,687.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,988.62 : 64,466.56 = 16,687.25 : x
2. Step 2: Convert to fraction form
   42,988.62/64,466.56 = 16,687.25/x
3. Step 3: Cross multiply
   42,988.62x = 64,466.56 × 16,687.25
4. Step 4: Simplify right side
   42,988.62x = 1,075,769,197.59
5. Step 5: Solve for x
   x = 1,075,769,197.59/42,988.62
6. Step 6: Final answer
   x = 25,024.51