Finding the Fourth Proportional to 42,693.82, 64,072.23 and 20,519.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,693.82 : 64,072.23 = 20,519.98 : x
2. Step 2: Convert to fraction form
   42,693.82/64,072.23 = 20,519.98/x
3. Step 3: Cross multiply
   42,693.82x = 64,072.23 × 20,519.98
4. Step 4: Simplify right side
   42,693.82x = 1,314,760,878.16
5. Step 5: Solve for x
   x = 1,314,760,878.16/42,693.82
6. Step 6: Final answer
   x = 30,795.11