Finding the Fourth Proportional to 139,148.72, 191,937.84 and 82,520

Step by Step Solution

1. Step 1: Write the proportion equation
   139,148.72 : 191,937.84 = 82,520 : x
2. Step 2: Convert to fraction form
   139,148.72/191,937.84 = 82,520/x
3. Step 3: Cross multiply
   139,148.72x = 191,937.84 × 82,520
4. Step 4: Simplify right side
   139,148.72x = 15,838,710,556.80
5. Step 5: Solve for x
   x = 15,838,710,556.80/139,148.72
6. Step 6: Final answer
   x = 113,825.77