Finding the Fourth Proportional to 465,039.34, 697,562.78 and 128,098.58

Step by Step Solution

1. Step 1: Write the proportion equation
   465,039.34 : 697,562.78 = 128,098.58 : x
2. Step 2: Convert to fraction form
   465,039.34/697,562.78 = 128,098.58/x
3. Step 3: Cross multiply
   465,039.34x = 697,562.78 × 128,098.58
4. Step 4: Simplify right side
   465,039.34x = 89,356,801,578.85
5. Step 5: Solve for x
   x = 89,356,801,578.85/465,039.34
6. Step 6: Final answer
   x = 192,148.91