Finding the Fourth Proportional to 139,749.71, 192,854.50 and 76,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,749.71 : 192,854.50 = 76,087.50 : x
2. Step 2: Convert to fraction form
   139,749.71/192,854.50 = 76,087.50/x
3. Step 3: Cross multiply
   139,749.71x = 192,854.50 × 76,087.50
4. Step 4: Simplify right side
   139,749.71x = 14,673,815,855.33
5. Step 5: Solve for x
   x = 14,673,815,855.33/139,749.71
6. Step 6: Final answer
   x = 105,000.69