Finding the Fourth Proportional to 160,891.10, 221,242.38 and 139,633.46

Step by Step Solution

1. Step 1: Write the proportion equation
   160,891.10 : 221,242.38 = 139,633.46 : x
2. Step 2: Convert to fraction form
   160,891.10/221,242.38 = 139,633.46/x
3. Step 3: Cross multiply
   160,891.10x = 221,242.38 × 139,633.46
4. Step 4: Simplify right side
   160,891.10x = 30,892,839,018.03
5. Step 5: Solve for x
   x = 30,892,839,018.03/160,891.10
6. Step 6: Final answer
   x = 192,010.86