Finding the Fourth Proportional to 42,713.80, 64,081.90 and 16,419.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,713.80 : 64,081.90 = 16,419.40 : x
2. Step 2: Convert to fraction form
   42,713.80/64,081.90 = 16,419.40/x
3. Step 3: Cross multiply
   42,713.80x = 64,081.90 × 16,419.40
4. Step 4: Simplify right side
   42,713.80x = 1,052,186,348.86
5. Step 5: Solve for x
   x = 1,052,186,348.86/42,713.80
6. Step 6: Final answer
   x = 24,633.41