Finding the Fourth Proportional to 161,968.72, 223,516.72 and 90,348.72

Step by Step Solution

1. Step 1: Write the proportion equation
   161,968.72 : 223,516.72 = 90,348.72 : x
2. Step 2: Convert to fraction form
   161,968.72/223,516.72 = 90,348.72/x
3. Step 3: Cross multiply
   161,968.72x = 223,516.72 × 90,348.72
4. Step 4: Simplify right side
   161,968.72x = 20,194,449,550.60
5. Step 5: Solve for x
   x = 20,194,449,550.60/161,968.72
6. Step 6: Final answer
   x = 124,681.17