Finding the Fourth Proportional to 139,900.39, 193,062.56 and 76,238.19

Step by Step Solution

1. Step 1: Write the proportion equation
   139,900.39 : 193,062.56 = 76,238.19 : x
2. Step 2: Convert to fraction form
   139,900.39/193,062.56 = 76,238.19/x
3. Step 3: Cross multiply
   139,900.39x = 193,062.56 × 76,238.19
4. Step 4: Simplify right side
   139,900.39x = 14,718,740,131.17
5. Step 5: Solve for x
   x = 14,718,740,131.17/139,900.39
6. Step 6: Final answer
   x = 105,208.71