Finding the Fourth Proportional to 42,066.78, 63,066.87 and 20,995.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,066.78 : 63,066.87 = 20,995.98 : x
2. Step 2: Convert to fraction form
   42,066.78/63,066.87 = 20,995.98/x
3. Step 3: Cross multiply
   42,066.78x = 63,066.87 × 20,995.98
4. Step 4: Simplify right side
   42,066.78x = 1,324,150,741.18
5. Step 5: Solve for x
   x = 1,324,150,741.18/42,066.78
6. Step 6: Final answer
   x = 31,477.35