Finding the Fourth Proportional to 42,631.76, 63,944.94 and 13,046.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,631.76 : 63,944.94 = 13,046.78 : x
2. Step 2: Convert to fraction form
   42,631.76/63,944.94 = 13,046.78/x
3. Step 3: Cross multiply
   42,631.76x = 63,944.94 × 13,046.78
4. Step 4: Simplify right side
   42,631.76x = 834,275,564.29
5. Step 5: Solve for x
   x = 834,275,564.29/42,631.76
6. Step 6: Final answer
   x = 19,569.34