Finding the Fourth Proportional to 139,069.78, 208,633.71 and 45,568.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,069.78 : 208,633.71 = 45,568.18 : x
2. Step 2: Convert to fraction form
   139,069.78/208,633.71 = 45,568.18/x
3. Step 3: Cross multiply
   139,069.78x = 208,633.71 × 45,568.18
4. Step 4: Simplify right side
   139,069.78x = 9,507,058,451.35
5. Step 5: Solve for x
   x = 9,507,058,451.35/139,069.78
6. Step 6: Final answer
   x = 68,361.79