Finding the Fourth Proportional to 2,118,225.69, 3,177,264.69 and 678,888.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118,225.69 : 3,177,264.69 = 678,888.09 : x
2. Step 2: Convert to fraction form
   2,118,225.69/3,177,264.69 = 678,888.09/x
3. Step 3: Cross multiply
   2,118,225.69x = 3,177,264.69 × 678,888.09
4. Step 4: Simplify right side
   2,118,225.69x = 2,157,007,156,818.54
5. Step 5: Solve for x
   x = 2,157,007,156,818.54/2,118,225.69
6. Step 6: Final answer
   x = 1,018,308.47