Finding the Fourth Proportional to 686,921.27, 948,064.83 and 381,096.18

Step by Step Solution

1. Step 1: Write the proportion equation
   686,921.27 : 948,064.83 = 381,096.18 : x
2. Step 2: Convert to fraction form
   686,921.27/948,064.83 = 381,096.18/x
3. Step 3: Cross multiply
   686,921.27x = 948,064.83 × 381,096.18
4. Step 4: Simplify right side
   686,921.27x = 361,303,885,105.35
5. Step 5: Solve for x
   x = 361,303,885,105.35/686,921.27
6. Step 6: Final answer
   x = 525,975.68