Finding the Fourth Proportional to 42,984.54, 64,495.89 and 16,691.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,984.54 : 64,495.89 = 16,691.28 : x
2. Step 2: Convert to fraction form
   42,984.54/64,495.89 = 16,691.28/x
3. Step 3: Cross multiply
   42,984.54x = 64,495.89 × 16,691.28
4. Step 4: Simplify right side
   42,984.54x = 1,076,518,958.84
5. Step 5: Solve for x
   x = 1,076,518,958.84/42,984.54
6. Step 6: Final answer
   x = 25,044.33