Finding the Fourth Proportional to 2,118,578.61, 2,923,626.33 and 1,200,980.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118,578.61 : 2,923,626.33 = 1,200,980.85 : x
2. Step 2: Convert to fraction form
   2,118,578.61/2,923,626.33 = 1,200,980.85/x
3. Step 3: Cross multiply
   2,118,578.61x = 2,923,626.33 × 1,200,980.85
4. Step 4: Simplify right side
   2,118,578.61x = 3,511,219,234,885.78
5. Step 5: Solve for x
   x = 3,511,219,234,885.78/2,118,578.61
6. Step 6: Final answer
   x = 1,657,346.68