Finding the Fourth Proportional to 1,427,697.20, 2,141,742.72 and 828,940.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427,697.20 : 2,141,742.72 = 828,940.34 : x
2. Step 2: Convert to fraction form
   1,427,697.20/2,141,742.72 = 828,940.34/x
3. Step 3: Cross multiply
   1,427,697.20x = 2,141,742.72 × 828,940.34
4. Step 4: Simplify right side
   1,427,697.20x = 1,775,376,938,509.33
5. Step 5: Solve for x
   x = 1,775,376,938,509.33/1,427,697.20
6. Step 6: Final answer
   x = 1,243,524.84