Finding the Fourth Proportional to 1,321,123.41, 1,823,153.81 and 777,279.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321,123.41 : 1,823,153.81 = 777,279.69 : x
2. Step 2: Convert to fraction form
   1,321,123.41/1,823,153.81 = 777,279.69/x
3. Step 3: Cross multiply
   1,321,123.41x = 1,823,153.81 × 777,279.69
4. Step 4: Simplify right side
   1,321,123.41x = 1,417,100,424,372.72
5. Step 5: Solve for x
   x = 1,417,100,424,372.72/1,321,123.41
6. Step 6: Final answer
   x = 1,072,648.03