Finding the Fourth Proportional to 112,939.05, 155,843.19 and 65,208.18

Step by Step Solution

1. Step 1: Write the proportion equation
   112,939.05 : 155,843.19 = 65,208.18 : x
2. Step 2: Convert to fraction form
   112,939.05/155,843.19 = 65,208.18/x
3. Step 3: Cross multiply
   112,939.05x = 155,843.19 × 65,208.18
4. Step 4: Simplify right side
   112,939.05x = 10,162,250,785.29
5. Step 5: Solve for x
   x = 10,162,250,785.29/112,939.05
6. Step 6: Final answer
   x = 89,979.96