Finding the Fourth Proportional to 108,128.16, 161,372.04 and 105,328.80

Step by Step Solution

1. Step 1: Write the proportion equation
   108,128.16 : 161,372.04 = 105,328.80 : x
2. Step 2: Convert to fraction form
   108,128.16/161,372.04 = 105,328.80/x
3. Step 3: Cross multiply
   108,128.16x = 161,372.04 × 105,328.80
4. Step 4: Simplify right side
   108,128.16x = 16,997,123,326.75
5. Step 5: Solve for x
   x = 16,997,123,326.75/108,128.16
6. Step 6: Final answer
   x = 157,194.23