Finding the Fourth Proportional to 139,868.37, 209,505.69 and 113,099.49

Step by Step Solution

1. Step 1: Write the proportion equation
   139,868.37 : 209,505.69 = 113,099.49 : x
2. Step 2: Convert to fraction form
   139,868.37/209,505.69 = 113,099.49/x
3. Step 3: Cross multiply
   139,868.37x = 209,505.69 × 113,099.49
4. Step 4: Simplify right side
   139,868.37x = 23,694,986,691.10
5. Step 5: Solve for x
   x = 23,694,986,691.10/139,868.37
6. Step 6: Final answer
   x = 169,409.19