Finding the Fourth Proportional to 153,057, 211,123.35 and 105,227.31

Step by Step Solution

1. Step 1: Write the proportion equation
   153,057 : 211,123.35 = 105,227.31 : x
2. Step 2: Convert to fraction form
   153,057/211,123.35 = 105,227.31/x
3. Step 3: Cross multiply
   153,057x = 211,123.35 × 105,227.31
4. Step 4: Simplify right side
   153,057x = 22,215,942,198.69
5. Step 5: Solve for x
   x = 22,215,942,198.69/153,057
6. Step 6: Final answer
   x = 145,148.16