Finding the Fourth Proportional to 712,059.60, 982,610.72 and 389,783.28

Step by Step Solution

1. Step 1: Write the proportion equation
   712,059.60 : 982,610.72 = 389,783.28 : x
2. Step 2: Convert to fraction form
   712,059.60/982,610.72 = 389,783.28/x
3. Step 3: Cross multiply
   712,059.60x = 982,610.72 × 389,783.28
4. Step 4: Simplify right side
   712,059.60x = 383,005,229,404.76
5. Step 5: Solve for x
   x = 383,005,229,404.76/712,059.60
6. Step 6: Final answer
   x = 537,883.67