Finding the Fourth Proportional to 1,036,149.47, 1,555,109.90 and 405,506.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036,149.47 : 1,555,109.90 = 405,506.15 : x
2. Step 2: Convert to fraction form
   1,036,149.47/1,555,109.90 = 405,506.15/x
3. Step 3: Cross multiply
   1,036,149.47x = 1,555,109.90 × 405,506.15
4. Step 4: Simplify right side
   1,036,149.47x = 630,606,628,375.89
5. Step 5: Solve for x
   x = 630,606,628,375.89/1,036,149.47
6. Step 6: Final answer
   x = 608,605.85