Finding the Fourth Proportional to 42,488.54, 63,732.79 and 12,906.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,488.54 : 63,732.79 = 12,906.26 : x
2. Step 2: Convert to fraction form
   42,488.54/63,732.79 = 12,906.26/x
3. Step 3: Cross multiply
   42,488.54x = 63,732.79 × 12,906.26
4. Step 4: Simplify right side
   42,488.54x = 822,551,958.27
5. Step 5: Solve for x
   x = 822,551,958.27/42,488.54
6. Step 6: Final answer
   x = 19,359.38