Finding the Fourth Proportional to 139,065.90, 208,615.05 and 50,361.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,065.90 : 208,615.05 = 50,361.18 : x
2. Step 2: Convert to fraction form
   139,065.90/208,615.05 = 50,361.18/x
3. Step 3: Cross multiply
   139,065.90x = 208,615.05 × 50,361.18
4. Step 4: Simplify right side
   139,065.90x = 10,506,100,083.76
5. Step 5: Solve for x
   x = 10,506,100,083.76/139,065.90
6. Step 6: Final answer
   x = 75,547.64