Finding the Fourth Proportional to 42,085.21, 63,137.54 and 12,502.39

Step by Step Solution

1. Step 1: Write the proportion equation
   42,085.21 : 63,137.54 = 12,502.39 : x
2. Step 2: Convert to fraction form
   42,085.21/63,137.54 = 12,502.39/x
3. Step 3: Cross multiply
   42,085.21x = 63,137.54 × 12,502.39
4. Step 4: Simplify right side
   42,085.21x = 789,370,148.72
5. Step 5: Solve for x
   x = 789,370,148.72/42,085.21
6. Step 6: Final answer
   x = 18,756.47