Finding the Fourth Proportional to 139,569.36, 209,090.32 and 82,472.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,569.36 : 209,090.32 = 82,472.94 : x
2. Step 2: Convert to fraction form
   139,569.36/209,090.32 = 82,472.94/x
3. Step 3: Cross multiply
   139,569.36x = 209,090.32 × 82,472.94
4. Step 4: Simplify right side
   139,569.36x = 17,244,293,415.94
5. Step 5: Solve for x
   x = 17,244,293,415.94/139,569.36
6. Step 6: Final answer
   x = 123,553.58