Finding the Fourth Proportional to 139,716.58, 209,606.01 and 50,970.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,716.58 : 209,606.01 = 50,970.09 : x
2. Step 2: Convert to fraction form
   139,716.58/209,606.01 = 50,970.09/x
3. Step 3: Cross multiply
   139,716.58x = 209,606.01 × 50,970.09
4. Step 4: Simplify right side
   139,716.58x = 10,683,636,199.77
5. Step 5: Solve for x
   x = 10,683,636,199.77/139,716.58
6. Step 6: Final answer
   x = 76,466.49