Finding the Fourth Proportional to 42,868.80, 64,285.16 and 16,210.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,868.80 : 64,285.16 = 16,210.31 : x
2. Step 2: Convert to fraction form
   42,868.80/64,285.16 = 16,210.31/x
3. Step 3: Cross multiply
   42,868.80x = 64,285.16 × 16,210.31
4. Step 4: Simplify right side
   42,868.80x = 1,042,081,969.52
5. Step 5: Solve for x
   x = 1,042,081,969.52/42,868.80
6. Step 6: Final answer
   x = 24,308.63