Finding the Fourth Proportional to 520,020.56, 780,028.17 and 165,061.94

Step by Step Solution

1. Step 1: Write the proportion equation
   520,020.56 : 780,028.17 = 165,061.94 : x
2. Step 2: Convert to fraction form
   520,020.56/780,028.17 = 165,061.94/x
3. Step 3: Cross multiply
   520,020.56x = 780,028.17 × 165,061.94
4. Step 4: Simplify right side
   520,020.56x = 128,752,962,994.85
5. Step 5: Solve for x
   x = 128,752,962,994.85/520,020.56
6. Step 6: Final answer
   x = 247,592.06