Finding the Fourth Proportional to 42,036.42, 63,063.86 and 12,456.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,036.42 : 63,063.86 = 12,456.57 : x
2. Step 2: Convert to fraction form
   42,036.42/63,063.86 = 12,456.57/x
3. Step 3: Cross multiply
   42,036.42x = 63,063.86 × 12,456.57
4. Step 4: Simplify right side
   42,036.42x = 785,559,324.28
5. Step 5: Solve for x
   x = 785,559,324.28/42,036.42
6. Step 6: Final answer
   x = 18,687.59