Finding the Fourth Proportional to 42,065.78, 63,065.37 and 20,994.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,065.78 : 63,065.37 = 20,994.98 : x
2. Step 2: Convert to fraction form
   42,065.78/63,065.37 = 20,994.98/x
3. Step 3: Cross multiply
   42,065.78x = 63,065.37 × 20,994.98
4. Step 4: Simplify right side
   42,065.78x = 1,324,055,913.01
5. Step 5: Solve for x
   x = 1,324,055,913.01/42,065.78
6. Step 6: Final answer
   x = 31,475.84