Finding the Fourth Proportional to 139,710.41, 209,439.25 and 50,943.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,710.41 : 209,439.25 = 50,943.15 : x
2. Step 2: Convert to fraction form
   139,710.41/209,439.25 = 50,943.15/x
3. Step 3: Cross multiply
   139,710.41x = 209,439.25 × 50,943.15
4. Step 4: Simplify right side
   139,710.41x = 10,669,495,001.28
5. Step 5: Solve for x
   x = 10,669,495,001.28/139,710.41
6. Step 6: Final answer
   x = 76,368.65