Finding the Fourth Proportional to 139,819.72, 209,680.17 and 45,046.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,819.72 : 209,680.17 = 45,046.08 : x
2. Step 2: Convert to fraction form
   139,819.72/209,680.17 = 45,046.08/x
3. Step 3: Cross multiply
   139,819.72x = 209,680.17 × 45,046.08
4. Step 4: Simplify right side
   139,819.72x = 9,445,269,712.23
5. Step 5: Solve for x
   x = 9,445,269,712.23/139,819.72
6. Step 6: Final answer
   x = 67,553.20