Finding the Fourth Proportional to 2,188,218.67, 3,019,618.91 and 1,221,411.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188,218.67 : 3,019,618.91 = 1,221,411.29 : x
2. Step 2: Convert to fraction form
   2,188,218.67/3,019,618.91 = 1,221,411.29/x
3. Step 3: Cross multiply
   2,188,218.67x = 3,019,618.91 × 1,221,411.29
4. Step 4: Simplify right side
   2,188,218.67x = 3,688,196,616,126.93
5. Step 5: Solve for x
   x = 3,688,196,616,126.93/2,188,218.67
6. Step 6: Final answer
   x = 1,685,479.00