Finding the Fourth Proportional to 128,314.05, 192,503.91 and 53,409.30

Step by Step Solution

1. Step 1: Write the proportion equation
   128,314.05 : 192,503.91 = 53,409.30 : x
2. Step 2: Convert to fraction form
   128,314.05/192,503.91 = 53,409.30/x
3. Step 3: Cross multiply
   128,314.05x = 192,503.91 × 53,409.30
4. Step 4: Simplify right side
   128,314.05x = 10,281,499,080.36
5. Step 5: Solve for x
   x = 10,281,499,080.36/128,314.05
6. Step 6: Final answer
   x = 80,127.62