Finding the Fourth Proportional to 139,524.19, 209,281.58 and 60,638.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,524.19 : 209,281.58 = 60,638.42 : x
2. Step 2: Convert to fraction form
   139,524.19/209,281.58 = 60,638.42/x
3. Step 3: Cross multiply
   139,524.19x = 209,281.58 × 60,638.42
4. Step 4: Simplify right side
   139,524.19x = 12,690,504,346.30
5. Step 5: Solve for x
   x = 12,690,504,346.30/139,524.19
6. Step 6: Final answer
   x = 90,955.59