Finding the Fourth Proportional to 686,566.50, 947,517.92 and 380,738.82

Step by Step Solution

1. Step 1: Write the proportion equation
   686,566.50 : 947,517.92 = 380,738.82 : x
2. Step 2: Convert to fraction form
   686,566.50/947,517.92 = 380,738.82/x
3. Step 3: Cross multiply
   686,566.50x = 947,517.92 × 380,738.82
4. Step 4: Simplify right side
   686,566.50x = 360,756,852,007.82
5. Step 5: Solve for x
   x = 360,756,852,007.82/686,566.50
6. Step 6: Final answer
   x = 525,450.70