Finding the Fourth Proportional to 139,715.33, 209,455.45 and 60,770.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,715.33 : 209,455.45 = 60,770.10 : x
2. Step 2: Convert to fraction form
   139,715.33/209,455.45 = 60,770.10/x
3. Step 3: Cross multiply
   139,715.33x = 209,455.45 × 60,770.10
4. Step 4: Simplify right side
   139,715.33x = 12,728,628,996.79
5. Step 5: Solve for x
   x = 12,728,628,996.79/139,715.33
6. Step 6: Final answer
   x = 91,104.02