Finding the Fourth Proportional to 687,015.57, 948,096.69 and 381,081.98

Step by Step Solution

1. Step 1: Write the proportion equation
   687,015.57 : 948,096.69 = 381,081.98 : x
2. Step 2: Convert to fraction form
   687,015.57/948,096.69 = 381,081.98/x
3. Step 3: Cross multiply
   687,015.57x = 948,096.69 × 381,081.98
4. Step 4: Simplify right side
   687,015.57x = 361,302,564,797.83
5. Step 5: Solve for x
   x = 361,302,564,797.83/687,015.57
6. Step 6: Final answer
   x = 525,901.56