Finding the Fourth Proportional to 682,784.56, 942,242.69 and 380,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   682,784.56 : 942,242.69 = 380,978.56 : x
2. Step 2: Convert to fraction form
   682,784.56/942,242.69 = 380,978.56/x
3. Step 3: Cross multiply
   682,784.56x = 942,242.69 × 380,978.56
4. Step 4: Simplify right side
   682,784.56x = 358,974,258,946.23
5. Step 5: Solve for x
   x = 358,974,258,946.23/682,784.56
6. Step 6: Final answer
   x = 525,750.41