Finding the Fourth Proportional to 1,261,414.32, 1,892,308.71 and 408,199.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,261,414.32 : 1,892,308.71 = 408,199.98 : x
2. Step 2: Convert to fraction form
   1,261,414.32/1,892,308.71 = 408,199.98/x
3. Step 3: Cross multiply
   1,261,414.32x = 1,892,308.71 × 408,199.98
4. Step 4: Simplify right side
   1,261,414.32x = 772,440,377,575.83
5. Step 5: Solve for x
   x = 772,440,377,575.83/1,261,414.32
6. Step 6: Final answer
   x = 612,360.56