Finding the Fourth Proportional to 42,429.69, 63,644.87 and 12,849.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,429.69 : 63,644.87 = 12,849.84 : x
2. Step 2: Convert to fraction form
   42,429.69/63,644.87 = 12,849.84/x
3. Step 3: Cross multiply
   42,429.69x = 63,644.87 × 12,849.84
4. Step 4: Simplify right side
   42,429.69x = 817,826,428.45
5. Step 5: Solve for x
   x = 817,826,428.45/42,429.69
6. Step 6: Final answer
   x = 19,274.86