Finding the Fourth Proportional to 2,172,613.86, 2,998,009.01 and 1,289,410.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172,613.86 : 2,998,009.01 = 1,289,410.72 : x
2. Step 2: Convert to fraction form
   2,172,613.86/2,998,009.01 = 1,289,410.72/x
3. Step 3: Cross multiply
   2,172,613.86x = 2,998,009.01 × 1,289,410.72
4. Step 4: Simplify right side
   2,172,613.86x = 3,865,664,951,879.09
5. Step 5: Solve for x
   x = 3,865,664,951,879.09/2,172,613.86
6. Step 6: Final answer
   x = 1,779,269.21