Finding the Fourth Proportional to 959,185.80, 1,439,556.30 and 928,081.80

Step by Step Solution

1. Step 1: Write the proportion equation
   959,185.80 : 1,439,556.30 = 928,081.80 : x
2. Step 2: Convert to fraction form
   959,185.80/1,439,556.30 = 928,081.80/x
3. Step 3: Cross multiply
   959,185.80x = 1,439,556.30 × 928,081.80
4. Step 4: Simplify right side
   959,185.80x = 1,336,026,002,105.34
5. Step 5: Solve for x
   x = 1,336,026,002,105.34/959,185.80
6. Step 6: Final answer
   x = 1,392,875.08