Finding the Fourth Proportional to 42,455.27, 63,692.09 and 12,875.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,455.27 : 63,692.09 = 12,875.34 : x
2. Step 2: Convert to fraction form
   42,455.27/63,692.09 = 12,875.34/x
3. Step 3: Cross multiply
   42,455.27x = 63,692.09 × 12,875.34
4. Step 4: Simplify right side
   42,455.27x = 820,057,346.25
5. Step 5: Solve for x
   x = 820,057,346.25/42,455.27
6. Step 6: Final answer
   x = 19,315.80