Finding the Fourth Proportional to 42,267.05, 63,406.76 and 12,687.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42,267.05 : 63,406.76 = 12,687.23 : x
2. Step 2: Convert to fraction form
   42,267.05/63,406.76 = 12,687.23/x
3. Step 3: Cross multiply
   42,267.05x = 63,406.76 × 12,687.23
4. Step 4: Simplify right side
   42,267.05x = 804,456,147.67
5. Step 5: Solve for x
   x = 804,456,147.67/42,267.05
6. Step 6: Final answer
   x = 19,032.70