Finding the Fourth Proportional to 1,153,469.31, 1,591,833.17 and 663,438.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153,469.31 : 1,591,833.17 = 663,438.04 : x
2. Step 2: Convert to fraction form
   1,153,469.31/1,591,833.17 = 663,438.04/x
3. Step 3: Cross multiply
   1,153,469.31x = 1,591,833.17 × 663,438.04
4. Step 4: Simplify right side
   1,153,469.31x = 1,056,082,678,809.89
5. Step 5: Solve for x
   x = 1,056,082,678,809.89/1,153,469.31
6. Step 6: Final answer
   x = 915,570.68