Finding the Fourth Proportional to 139,974.89, 193,166.47 and 76,313.14

Step by Step Solution

1. Step 1: Write the proportion equation
   139,974.89 : 193,166.47 = 76,313.14 : x
2. Step 2: Convert to fraction form
   139,974.89/193,166.47 = 76,313.14/x
3. Step 3: Cross multiply
   139,974.89x = 193,166.47 × 76,313.14
4. Step 4: Simplify right side
   139,974.89x = 14,741,139,480.89
5. Step 5: Solve for x
   x = 14,741,139,480.89/139,974.89
6. Step 6: Final answer
   x = 105,312.75