Finding the Fourth Proportional to 1,008,488.86, 1,391,714.61 and 555,779.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,488.86 : 1,391,714.61 = 555,779.86 : x
2. Step 2: Convert to fraction form
   1,008,488.86/1,391,714.61 = 555,779.86/x
3. Step 3: Cross multiply
   1,008,488.86x = 1,391,714.61 × 555,779.86
4. Step 4: Simplify right side
   1,008,488.86x = 773,486,951,105.76
5. Step 5: Solve for x
   x = 773,486,951,105.76/1,008,488.86
6. Step 6: Final answer
   x = 766,976.20