Finding the Fourth Proportional to 465,109.52, 697,539.38 and 128,069.93

Step by Step Solution

1. Step 1: Write the proportion equation
   465,109.52 : 697,539.38 = 128,069.93 : x
2. Step 2: Convert to fraction form
   465,109.52/697,539.38 = 128,069.93/x
3. Step 3: Cross multiply
   465,109.52x = 697,539.38 × 128,069.93
4. Step 4: Simplify right side
   465,109.52x = 89,333,815,440.80
5. Step 5: Solve for x
   x = 89,333,815,440.80/465,109.52
6. Step 6: Final answer
   x = 192,070.50