Finding the Fourth Proportional to 42,932.90, 64,423.71 and 16,639.46

Step by Step Solution

1. Step 1: Write the proportion equation
   42,932.90 : 64,423.71 = 16,639.46 : x
2. Step 2: Convert to fraction form
   42,932.90/64,423.71 = 16,639.46/x
3. Step 3: Cross multiply
   42,932.90x = 64,423.71 × 16,639.46
4. Step 4: Simplify right side
   42,932.90x = 1,071,975,745.60
5. Step 5: Solve for x
   x = 1,071,975,745.60/42,932.90
6. Step 6: Final answer
   x = 24,968.63