Finding the Fourth Proportional to 42,186.10, 63,310.27 and 19,999.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,186.10 : 63,310.27 = 19,999.38 : x
2. Step 2: Convert to fraction form
   42,186.10/63,310.27 = 19,999.38/x
3. Step 3: Cross multiply
   42,186.10x = 63,310.27 × 19,999.38
4. Step 4: Simplify right side
   42,186.10x = 1,266,166,147.63
5. Step 5: Solve for x
   x = 1,266,166,147.63/42,186.10
6. Step 6: Final answer
   x = 30,013.82