Finding the Fourth Proportional to 139,940.53, 209,923.38 and 45,172.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,940.53 : 209,923.38 = 45,172.96 : x
2. Step 2: Convert to fraction form
   139,940.53/209,923.38 = 45,172.96/x
3. Step 3: Cross multiply
   139,940.53x = 209,923.38 × 45,172.96
4. Step 4: Simplify right side
   139,940.53x = 9,482,859,923.00
5. Step 5: Solve for x
   x = 9,482,859,923.00/139,940.53
6. Step 6: Final answer
   x = 67,763.50