Finding the Fourth Proportional to 861,822.18, 1,293,323.76 and 300,856.68

Step by Step Solution

1. Step 1: Write the proportion equation
   861,822.18 : 1,293,323.76 = 300,856.68 : x
2. Step 2: Convert to fraction form
   861,822.18/1,293,323.76 = 300,856.68/x
3. Step 3: Cross multiply
   861,822.18x = 1,293,323.76 × 300,856.68
4. Step 4: Simplify right side
   861,822.18x = 389,105,092,598.72
5. Step 5: Solve for x
   x = 389,105,092,598.72/861,822.18
6. Step 6: Final answer
   x = 451,491.16