Finding the Fourth Proportional to 139,945.02, 209,938.28 and 45,144.03

Step by Step Solution

1. Step 1: Write the proportion equation
   139,945.02 : 209,938.28 = 45,144.03 : x
2. Step 2: Convert to fraction form
   139,945.02/209,938.28 = 45,144.03/x
3. Step 3: Cross multiply
   139,945.02x = 209,938.28 × 45,144.03
4. Step 4: Simplify right side
   139,945.02x = 9,477,459,784.75
5. Step 5: Solve for x
   x = 9,477,459,784.75/139,945.02
6. Step 6: Final answer
   x = 67,722.74