Finding the Fourth Proportional to 139,401.18, 209,119.05 and 45,939.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,401.18 : 209,119.05 = 45,939.42 : x
2. Step 2: Convert to fraction form
   139,401.18/209,119.05 = 45,939.42/x
3. Step 3: Cross multiply
   139,401.18x = 209,119.05 × 45,939.42
4. Step 4: Simplify right side
   139,401.18x = 9,606,807,867.95
5. Step 5: Solve for x
   x = 9,606,807,867.95/139,401.18
6. Step 6: Final answer
   x = 68,914.82