Finding the Fourth Proportional to 768,099.34, 1,059,976.43 and 428,567.59

Step by Step Solution

1. Step 1: Write the proportion equation
   768,099.34 : 1,059,976.43 = 428,567.59 : x
2. Step 2: Convert to fraction form
   768,099.34/1,059,976.43 = 428,567.59/x
3. Step 3: Cross multiply
   768,099.34x = 1,059,976.43 × 428,567.59
4. Step 4: Simplify right side
   768,099.34x = 454,271,544,851.17
5. Step 5: Solve for x
   x = 454,271,544,851.17/768,099.34
6. Step 6: Final answer
   x = 591,422.91