Finding the Fourth Proportional to 1,036,556.58, 1,555,030.89 and 405,430.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036,556.58 : 1,555,030.89 = 405,430.50 : x
2. Step 2: Convert to fraction form
   1,036,556.58/1,555,030.89 = 405,430.50/x
3. Step 3: Cross multiply
   1,036,556.58x = 1,555,030.89 × 405,430.50
4. Step 4: Simplify right side
   1,036,556.58x = 630,456,951,248.15
5. Step 5: Solve for x
   x = 630,456,951,248.15/1,036,556.58
6. Step 6: Final answer
   x = 608,222.42