Finding the Fourth Proportional to 120,113.16, 165,756.15 and 65,665.53

Step by Step Solution

1. Step 1: Write the proportion equation
   120,113.16 : 165,756.15 = 65,665.53 : x
2. Step 2: Convert to fraction form
   120,113.16/165,756.15 = 65,665.53/x
3. Step 3: Cross multiply
   120,113.16x = 165,756.15 × 65,665.53
4. Step 4: Simplify right side
   120,113.16x = 10,884,465,440.51
5. Step 5: Solve for x
   x = 10,884,465,440.51/120,113.16
6. Step 6: Final answer
   x = 90,618.43