Finding the Fourth Proportional to 1,389,061.70, 2,079,445.35 and 827,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,061.70 : 2,079,445.35 = 827,807.30 : x
2. Step 2: Convert to fraction form
   1,389,061.70/2,079,445.35 = 827,807.30/x
3. Step 3: Cross multiply
   1,389,061.70x = 2,079,445.35 × 827,807.30
4. Step 4: Simplify right side
   1,389,061.70x = 1,721,380,040,681.06
5. Step 5: Solve for x
   x = 1,721,380,040,681.06/1,389,061.70
6. Step 6: Final answer
   x = 1,239,239.44