Finding the Fourth Proportional to 680,826.72, 939,522.60 and 379,020.72

Step by Step Solution

1. Step 1: Write the proportion equation
   680,826.72 : 939,522.60 = 379,020.72 : x
2. Step 2: Convert to fraction form
   680,826.72/939,522.60 = 379,020.72/x
3. Step 3: Cross multiply
   680,826.72x = 939,522.60 × 379,020.72
4. Step 4: Simplify right side
   680,826.72x = 356,098,532,308.27
5. Step 5: Solve for x
   x = 356,098,532,308.27/680,826.72
6. Step 6: Final answer
   x = 523,038.42