Finding the Fourth Proportional to 42,371.49, 63,555.57 and 12,788.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,371.49 : 63,555.57 = 12,788.52 : x
2. Step 2: Convert to fraction form
   42,371.49/63,555.57 = 12,788.52/x
3. Step 3: Cross multiply
   42,371.49x = 63,555.57 × 12,788.52
4. Step 4: Simplify right side
   42,371.49x = 812,781,678.06
5. Step 5: Solve for x
   x = 812,781,678.06/42,371.49
6. Step 6: Final answer
   x = 19,182.28