Finding the Fourth Proportional to 120,006.18, 165,608.63 and 65,559.10

Step by Step Solution

1. Step 1: Write the proportion equation
   120,006.18 : 165,608.63 = 65,559.10 : x
2. Step 2: Convert to fraction form
   120,006.18/165,608.63 = 65,559.10/x
3. Step 3: Cross multiply
   120,006.18x = 165,608.63 × 65,559.10
4. Step 4: Simplify right side
   120,006.18x = 10,857,152,735.03
5. Step 5: Solve for x
   x = 10,857,152,735.03/120,006.18
6. Step 6: Final answer
   x = 90,471.61