Finding the Fourth Proportional to 144,953.50, 217,450.76 and 45,123.78

Step by Step Solution

1. Step 1: Write the proportion equation
   144,953.50 : 217,450.76 = 45,123.78 : x
2. Step 2: Convert to fraction form
   144,953.50/217,450.76 = 45,123.78/x
3. Step 3: Cross multiply
   144,953.50x = 217,450.76 × 45,123.78
4. Step 4: Simplify right side
   144,953.50x = 9,812,201,098.72
5. Step 5: Solve for x
   x = 9,812,201,098.72/144,953.50
6. Step 6: Final answer
   x = 67,692.06