Finding the Fourth Proportional to 42,630.72, 63,920.32 and 16,989.00

Step by Step Solution

1. Step 1: Write the proportion equation
   42,630.72 : 63,920.32 = 16,989.00 : x
2. Step 2: Convert to fraction form
   42,630.72/63,920.32 = 16,989.00/x
3. Step 3: Cross multiply
   42,630.72x = 63,920.32 × 16,989.00
4. Step 4: Simplify right side
   42,630.72x = 1,085,941,996.88
5. Step 5: Solve for x
   x = 1,085,941,996.88/42,630.72
6. Step 6: Final answer
   x = 25,473.23