Finding the Fourth Proportional to 112,911.68, 155,806.89 and 65,180.40

Step by Step Solution

1. Step 1: Write the proportion equation
   112,911.68 : 155,806.89 = 65,180.40 : x
2. Step 2: Convert to fraction form
   112,911.68/155,806.89 = 65,180.40/x
3. Step 3: Cross multiply
   112,911.68x = 155,806.89 × 65,180.40
4. Step 4: Simplify right side
   112,911.68x = 10,155,555,412.96
5. Step 5: Solve for x
   x = 10,155,555,412.96/112,911.68
6. Step 6: Final answer
   x = 89,942.47