Finding the Fourth Proportional to 42,052.38, 63,078.78 and 12,470.46

Step by Step Solution

1. Step 1: Write the proportion equation
   42,052.38 : 63,078.78 = 12,470.46 : x
2. Step 2: Convert to fraction form
   42,052.38/63,078.78 = 12,470.46/x
3. Step 3: Cross multiply
   42,052.38x = 63,078.78 × 12,470.46
4. Step 4: Simplify right side
   42,052.38x = 786,621,402.84
5. Step 5: Solve for x
   x = 786,621,402.84/42,052.38
6. Step 6: Final answer
   x = 18,705.75