Finding the Fourth Proportional to 139,791.83, 192,914.79 and 76,129.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,791.83 : 192,914.79 = 76,129.48 : x
2. Step 2: Convert to fraction form
   139,791.83/192,914.79 = 76,129.48/x
3. Step 3: Cross multiply
   139,791.83x = 192,914.79 × 76,129.48
4. Step 4: Simplify right side
   139,791.83x = 14,686,502,164.72
5. Step 5: Solve for x
   x = 14,686,502,164.72/139,791.83
6. Step 6: Final answer
   x = 105,059.80