Finding the Fourth Proportional to 2,804,964.50, 4,208,146.60 and 810,420.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,804,964.50 : 4,208,146.60 = 810,420.50 : x
2. Step 2: Convert to fraction form
   2,804,964.50/4,208,146.60 = 810,420.50/x
3. Step 3: Cross multiply
   2,804,964.50x = 4,208,146.60 × 810,420.50
4. Step 4: Simplify right side
   2,804,964.50x = 3,410,368,271,645.30
5. Step 5: Solve for x
   x = 3,410,368,271,645.30/2,804,964.50
6. Step 6: Final answer
   x = 1,215,832.95