Finding the Fourth Proportional to 1,131,196.63, 1,561,011.46 and 621,895.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131,196.63 : 1,561,011.46 = 621,895.09 : x
2. Step 2: Convert to fraction form
   1,131,196.63/1,561,011.46 = 621,895.09/x
3. Step 3: Cross multiply
   1,131,196.63x = 1,561,011.46 × 621,895.09
4. Step 4: Simplify right side
   1,131,196.63x = 970,785,362,407.73
5. Step 5: Solve for x
   x = 970,785,362,407.73/1,131,196.63
6. Step 6: Final answer
   x = 858,193.29