Finding the Fourth Proportional to 139,441.78, 209,195.46 and 45,947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,441.78 : 209,195.46 = 45,947.50 : x
2. Step 2: Convert to fraction form
   139,441.78/209,195.46 = 45,947.50/x
3. Step 3: Cross multiply
   139,441.78x = 209,195.46 × 45,947.50
4. Step 4: Simplify right side
   139,441.78x = 9,612,008,398.35
5. Step 5: Solve for x
   x = 9,612,008,398.35/139,441.78
6. Step 6: Final answer
   x = 68,932.05