Finding the Fourth Proportional to 389,994.72, 585,079.56 and 123,763.92

Step by Step Solution

1. Step 1: Write the proportion equation
   389,994.72 : 585,079.56 = 123,763.92 : x
2. Step 2: Convert to fraction form
   389,994.72/585,079.56 = 123,763.92/x
3. Step 3: Cross multiply
   389,994.72x = 585,079.56 × 123,763.92
4. Step 4: Simplify right side
   389,994.72x = 72,411,739,857.48
5. Step 5: Solve for x
   x = 72,411,739,857.48/389,994.72
6. Step 6: Final answer
   x = 185,673.64