Finding the Fourth Proportional to 139,337.82, 209,078.73 and 69,215.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,337.82 : 209,078.73 = 69,215.58 : x
2. Step 2: Convert to fraction form
   139,337.82/209,078.73 = 69,215.58/x
3. Step 3: Cross multiply
   139,337.82x = 209,078.73 × 69,215.58
4. Step 4: Simplify right side
   139,337.82x = 14,471,505,562.61
5. Step 5: Solve for x
   x = 14,471,505,562.61/139,337.82
6. Step 6: Final answer
   x = 103,859.14