Finding the Fourth Proportional to 789,570.02, 1,184,231.30 and 257,087.46

Step by Step Solution

1. Step 1: Write the proportion equation
   789,570.02 : 1,184,231.30 = 257,087.46 : x
2. Step 2: Convert to fraction form
   789,570.02/1,184,231.30 = 257,087.46/x
3. Step 3: Cross multiply
   789,570.02x = 1,184,231.30 × 257,087.46
4. Step 4: Simplify right side
   789,570.02x = 304,451,016,969.50
5. Step 5: Solve for x
   x = 304,451,016,969.50/789,570.02
6. Step 6: Final answer
   x = 385,590.90