Finding the Fourth Proportional to 42,369.35, 63,564.29 and 12,785.39

Step by Step Solution

1. Step 1: Write the proportion equation
   42,369.35 : 63,564.29 = 12,785.39 : x
2. Step 2: Convert to fraction form
   42,369.35/63,564.29 = 12,785.39/x
3. Step 3: Cross multiply
   42,369.35x = 63,564.29 × 12,785.39
4. Step 4: Simplify right side
   42,369.35x = 812,693,951.87
5. Step 5: Solve for x
   x = 812,693,951.87/42,369.35
6. Step 6: Final answer
   x = 19,181.17