Finding the Fourth Proportional to 139,900.38, 193,064.84 and 76,238.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,900.38 : 193,064.84 = 76,238.18 : x
2. Step 2: Convert to fraction form
   139,900.38/193,064.84 = 76,238.18/x
3. Step 3: Cross multiply
   139,900.38x = 193,064.84 × 76,238.18
4. Step 4: Simplify right side
   139,900.38x = 14,718,912,023.59
5. Step 5: Solve for x
   x = 14,718,912,023.59/139,900.38
6. Step 6: Final answer
   x = 105,209.95