Finding the Fourth Proportional to 139,839.83, 209,790.11 and 51,093.19

Step by Step Solution

1. Step 1: Write the proportion equation
   139,839.83 : 209,790.11 = 51,093.19 : x
2. Step 2: Convert to fraction form
   139,839.83/209,790.11 = 51,093.19/x
3. Step 3: Cross multiply
   139,839.83x = 209,790.11 × 51,093.19
4. Step 4: Simplify right side
   139,839.83x = 10,718,845,553.61
5. Step 5: Solve for x
   x = 10,718,845,553.61/139,839.83
6. Step 6: Final answer
   x = 76,650.88