Finding the Fourth Proportional to 2,166,046.28, 2,988,205.20 and 1,306,128.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166,046.28 : 2,988,205.20 = 1,306,128.82 : x
2. Step 2: Convert to fraction form
   2,166,046.28/2,988,205.20 = 1,306,128.82/x
3. Step 3: Cross multiply
   2,166,046.28x = 2,988,205.20 × 1,306,128.82
4. Step 4: Simplify right side
   2,166,046.28x = 3,902,980,931,793.86
5. Step 5: Solve for x
   x = 3,902,980,931,793.86/2,166,046.28
6. Step 6: Final answer
   x = 1,801,891.75