Finding the Fourth Proportional to 139,448.25, 209,205.18 and 45,954

Step by Step Solution

1. Step 1: Write the proportion equation
   139,448.25 : 209,205.18 = 45,954 : x
2. Step 2: Convert to fraction form
   139,448.25/209,205.18 = 45,954/x
3. Step 3: Cross multiply
   139,448.25x = 209,205.18 × 45,954
4. Step 4: Simplify right side
   139,448.25x = 9,613,814,841.72
5. Step 5: Solve for x
   x = 9,613,814,841.72/139,448.25
6. Step 6: Final answer
   x = 68,941.81