Finding the Fourth Proportional to 139,748.86, 192,853.83 and 76,087.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,748.86 : 192,853.83 = 76,087.09 : x
2. Step 2: Convert to fraction form
   139,748.86/192,853.83 = 76,087.09/x
3. Step 3: Cross multiply
   139,748.86x = 192,853.83 × 76,087.09
4. Step 4: Simplify right side
   139,748.86x = 14,673,686,720.05
5. Step 5: Solve for x
   x = 14,673,686,720.05/139,748.86
6. Step 6: Final answer
   x = 105,000.40