Finding the Fourth Proportional to 409,866.89, 610,725.83 and 365,150.03

Step by Step Solution

1. Step 1: Write the proportion equation
   409,866.89 : 610,725.83 = 365,150.03 : x
2. Step 2: Convert to fraction form
   409,866.89/610,725.83 = 365,150.03/x
3. Step 3: Cross multiply
   409,866.89x = 610,725.83 × 365,150.03
4. Step 4: Simplify right side
   409,866.89x = 223,006,550,266.90
5. Step 5: Solve for x
   x = 223,006,550,266.90/409,866.89
6. Step 6: Final answer
   x = 544,095.07