Finding the Fourth Proportional to 162,018.69, 223,581.15 and 90,397.18

Step by Step Solution

1. Step 1: Write the proportion equation
   162,018.69 : 223,581.15 = 90,397.18 : x
2. Step 2: Convert to fraction form
   162,018.69/223,581.15 = 90,397.18/x
3. Step 3: Cross multiply
   162,018.69x = 223,581.15 × 90,397.18
4. Step 4: Simplify right side
   162,018.69x = 20,211,105,461.16
5. Step 5: Solve for x
   x = 20,211,105,461.16/162,018.69
6. Step 6: Final answer
   x = 124,745.52