Finding the Fourth Proportional to 139,988.82, 193,187.25 and 76,329.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,988.82 : 193,187.25 = 76,329.30 : x
2. Step 2: Convert to fraction form
   139,988.82/193,187.25 = 76,329.30/x
3. Step 3: Cross multiply
   139,988.82x = 193,187.25 × 76,329.30
4. Step 4: Simplify right side
   139,988.82x = 14,745,847,561.43
5. Step 5: Solve for x
   x = 14,745,847,561.43/139,988.82
6. Step 6: Final answer
   x = 105,335.89