Finding the Fourth Proportional to 112,581.69, 169,065.72 and 99,959.97

Step by Step Solution

1. Step 1: Write the proportion equation
   112,581.69 : 169,065.72 = 99,959.97 : x
2. Step 2: Convert to fraction form
   112,581.69/169,065.72 = 99,959.97/x
3. Step 3: Cross multiply
   112,581.69x = 169,065.72 × 99,959.97
4. Step 4: Simplify right side
   112,581.69x = 16,899,804,299.23
5. Step 5: Solve for x
   x = 16,899,804,299.23/112,581.69
6. Step 6: Final answer
   x = 150,111.48