Finding the Fourth Proportional to 139,046.33, 208,408.85 and 64,009.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,046.33 : 208,408.85 = 64,009.15 : x
2. Step 2: Convert to fraction form
   139,046.33/208,408.85 = 64,009.15/x
3. Step 3: Cross multiply
   139,046.33x = 208,408.85 × 64,009.15
4. Step 4: Simplify right side
   139,046.33x = 13,340,072,739.94
5. Step 5: Solve for x
   x = 13,340,072,739.94/139,046.33
6. Step 6: Final answer
   x = 95,939.77