Finding the Fourth Proportional to 139,748.56, 192,843.25 and 79,320.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,748.56 : 192,843.25 = 79,320.47 : x
2. Step 2: Convert to fraction form
   139,748.56/192,843.25 = 79,320.47/x
3. Step 3: Cross multiply
   139,748.56x = 192,843.25 × 79,320.47
4. Step 4: Simplify right side
   139,748.56x = 15,296,416,063.81
5. Step 5: Solve for x
   x = 15,296,416,063.81/139,748.56
6. Step 6: Final answer
   x = 109,456.70