Finding the Fourth Proportional to 2,612,842, 3,919,276.21 and 815,574.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612,842 : 3,919,276.21 = 815,574.81 : x
2. Step 2: Convert to fraction form
   2,612,842/3,919,276.21 = 815,574.81/x
3. Step 3: Cross multiply
   2,612,842x = 3,919,276.21 × 815,574.81
4. Step 4: Simplify right side
   2,612,842x = 3,196,462,950,308.27
5. Step 5: Solve for x
   x = 3,196,462,950,308.27/2,612,842
6. Step 6: Final answer
   x = 1,223,366.34