Finding the Fourth Proportional to 42,038.42, 63,057.86 and 12,456.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,038.42 : 63,057.86 = 12,456.51 : x
2. Step 2: Convert to fraction form
   42,038.42/63,057.86 = 12,456.51/x
3. Step 3: Cross multiply
   42,038.42x = 63,057.86 × 12,456.51
4. Step 4: Simplify right side
   42,038.42x = 785,480,801.39
5. Step 5: Solve for x
   x = 785,480,801.39/42,038.42
6. Step 6: Final answer
   x = 18,684.83