Finding the Fourth Proportional to 404,651.40, 605,810.70 and 404,651.40

Step by Step Solution

1. Step 1: Write the proportion equation
   404,651.40 : 605,810.70 = 404,651.40 : x
2. Step 2: Convert to fraction form
   404,651.40/605,810.70 = 404,651.40/x
3. Step 3: Cross multiply
   404,651.40x = 605,810.70 × 404,651.40
4. Step 4: Simplify right side
   404,651.40x = 245,142,147,889.98
5. Step 5: Solve for x
   x = 245,142,147,889.98/404,651.40
6. Step 6: Final answer
   x = 605,810.70