Finding the Fourth Proportional to 443,816.89, 611,985.65 and 282,465.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,816.89 : 611,985.65 = 282,465.50 : x
2. Step 2: Convert to fraction form
   443,816.89/611,985.65 = 282,465.50/x
3. Step 3: Cross multiply
   443,816.89x = 611,985.65 × 282,465.50
4. Step 4: Simplify right side
   443,816.89x = 172,864,828,147.82
5. Step 5: Solve for x
   x = 172,864,828,147.82/443,816.89
6. Step 6: Final answer
   x = 389,495.83