Finding the Fourth Proportional to 128,401.62, 192,498.05 and 53,577.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,401.62 : 192,498.05 = 53,577.50 : x
2. Step 2: Convert to fraction form
   128,401.62/192,498.05 = 53,577.50/x
3. Step 3: Cross multiply
   128,401.62x = 192,498.05 × 53,577.50
4. Step 4: Simplify right side
   128,401.62x = 10,313,563,043.50
5. Step 5: Solve for x
   x = 10,313,563,043.50/128,401.62
6. Step 6: Final answer
   x = 80,322.69