Finding the Fourth Proportional to 139,113.09, 208,546.52 and 67,029.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,113.09 : 208,546.52 = 67,029.57 : x
2. Step 2: Convert to fraction form
   139,113.09/208,546.52 = 67,029.57/x
3. Step 3: Cross multiply
   139,113.09x = 208,546.52 × 67,029.57
4. Step 4: Simplify right side
   139,113.09x = 13,978,783,225.45
5. Step 5: Solve for x
   x = 13,978,783,225.45/139,113.09
6. Step 6: Final answer
   x = 100,485.03