Finding the Fourth Proportional to 139,062.41, 208,593.20 and 50,315.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,062.41 : 208,593.20 = 50,315.57 : x
2. Step 2: Convert to fraction form
   139,062.41/208,593.20 = 50,315.57/x
3. Step 3: Cross multiply
   139,062.41x = 208,593.20 × 50,315.57
4. Step 4: Simplify right side
   139,062.41x = 10,495,484,461.58
5. Step 5: Solve for x
   x = 10,495,484,461.58/139,062.41
6. Step 6: Final answer
   x = 75,473.20