Finding the Fourth Proportional to 1,200,665.79, 1,656,918.24 and 656,801.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,665.79 : 1,656,918.24 = 656,801.44 : x
2. Step 2: Convert to fraction form
   1,200,665.79/1,656,918.24 = 656,801.44/x
3. Step 3: Cross multiply
   1,200,665.79x = 1,656,918.24 × 656,801.44
4. Step 4: Simplify right side
   1,200,665.79x = 1,088,266,285,994.27
5. Step 5: Solve for x
   x = 1,088,266,285,994.27/1,200,665.79
6. Step 6: Final answer
   x = 906,385.69