Finding the Fourth Proportional to 139,898.45, 193,059.56 and 76,236.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,898.45 : 193,059.56 = 76,236.09 : x
2. Step 2: Convert to fraction form
   139,898.45/193,059.56 = 76,236.09/x
3. Step 3: Cross multiply
   139,898.45x = 193,059.56 × 76,236.09
4. Step 4: Simplify right side
   139,898.45x = 14,718,105,610.34
5. Step 5: Solve for x
   x = 14,718,105,610.34/139,898.45
6. Step 6: Final answer
   x = 105,205.64