Finding the Fourth Proportional to 161,648.71, 223,082.10 and 90,028.72

Step by Step Solution

1. Step 1: Write the proportion equation
   161,648.71 : 223,082.10 = 90,028.72 : x
2. Step 2: Convert to fraction form
   161,648.71/223,082.10 = 90,028.72/x
3. Step 3: Cross multiply
   161,648.71x = 223,082.10 × 90,028.72
4. Step 4: Simplify right side
   161,648.71x = 20,083,796,196.76
5. Step 5: Solve for x
   x = 20,083,796,196.76/161,648.71
6. Step 6: Final answer
   x = 124,243.47