Finding the Fourth Proportional to 686,013.30, 946,686.15 and 380,083.59

Step by Step Solution

1. Step 1: Write the proportion equation
   686,013.30 : 946,686.15 = 380,083.59 : x
2. Step 2: Convert to fraction form
   686,013.30/946,686.15 = 380,083.59/x
3. Step 3: Cross multiply
   686,013.30x = 946,686.15 × 380,083.59
4. Step 4: Simplify right side
   686,013.30x = 359,819,870,495.28
5. Step 5: Solve for x
   x = 359,819,870,495.28/686,013.30
6. Step 6: Final answer
   x = 524,508.59