Finding the Fourth Proportional to 42,989.76, 64,501.20 and 16,713

Step by Step Solution

1. Step 1: Write the proportion equation
   42,989.76 : 64,501.20 = 16,713 : x
2. Step 2: Convert to fraction form
   42,989.76/64,501.20 = 16,713/x
3. Step 3: Cross multiply
   42,989.76x = 64,501.20 × 16,713
4. Step 4: Simplify right side
   42,989.76x = 1,078,008,555.60
5. Step 5: Solve for x
   x = 1,078,008,555.60/42,989.76
6. Step 6: Final answer
   x = 25,075.94