Finding the Fourth Proportional to 520,018.56, 780,025.17 and 165,059.94

Step by Step Solution

1. Step 1: Write the proportion equation
   520,018.56 : 780,025.17 = 165,059.94 : x
2. Step 2: Convert to fraction form
   520,018.56/780,025.17 = 165,059.94/x
3. Step 3: Cross multiply
   520,018.56x = 780,025.17 × 165,059.94
4. Step 4: Simplify right side
   520,018.56x = 128,750,907,758.69
5. Step 5: Solve for x
   x = 128,750,907,758.69/520,018.56
6. Step 6: Final answer
   x = 247,589.06