Finding the Fourth Proportional to 161,823.99, 223,320.12 and 90,196.41

Step by Step Solution

1. Step 1: Write the proportion equation
   161,823.99 : 223,320.12 = 90,196.41 : x
2. Step 2: Convert to fraction form
   161,823.99/223,320.12 = 90,196.41/x
3. Step 3: Cross multiply
   161,823.99x = 223,320.12 × 90,196.41
4. Step 4: Simplify right side
   161,823.99x = 20,142,673,104.77
5. Step 5: Solve for x
   x = 20,142,673,104.77/161,823.99
6. Step 6: Final answer
   x = 124,472.73