Finding the Fourth Proportional to 2,188,085.92, 3,019,710.36 and 1,221,404.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188,085.92 : 3,019,710.36 = 1,221,404.56 : x
2. Step 2: Convert to fraction form
   2,188,085.92/3,019,710.36 = 1,221,404.56/x
3. Step 3: Cross multiply
   2,188,085.92x = 3,019,710.36 × 1,221,404.56
4. Step 4: Simplify right side
   2,188,085.92x = 3,688,288,003,583.24
5. Step 5: Solve for x
   x = 3,688,288,003,583.24/2,188,085.92
6. Step 6: Final answer
   x = 1,685,623.02