Finding the Fourth Proportional to 42,469.39, 63,700.83 and 12,887.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,469.39 : 63,700.83 = 12,887.38 : x
2. Step 2: Convert to fraction form
   42,469.39/63,700.83 = 12,887.38/x
3. Step 3: Cross multiply
   42,469.39x = 63,700.83 × 12,887.38
4. Step 4: Simplify right side
   42,469.39x = 820,936,802.53
5. Step 5: Solve for x
   x = 820,936,802.53/42,469.39
6. Step 6: Final answer
   x = 19,330.08