Finding the Fourth Proportional to 139,414.59, 209,109.06 and 45,920.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,414.59 : 209,109.06 = 45,920.34 : x
2. Step 2: Convert to fraction form
   139,414.59/209,109.06 = 45,920.34/x
3. Step 3: Cross multiply
   139,414.59x = 209,109.06 × 45,920.34
4. Step 4: Simplify right side
   139,414.59x = 9,602,359,132.28
5. Step 5: Solve for x
   x = 9,602,359,132.28/139,414.59
6. Step 6: Final answer
   x = 68,876.29