Finding the Fourth Proportional to 139,782.06, 192,892.68 and 79,344.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,782.06 : 192,892.68 = 79,344.72 : x
2. Step 2: Convert to fraction form
   139,782.06/192,892.68 = 79,344.72/x
3. Step 3: Cross multiply
   139,782.06x = 192,892.68 × 79,344.72
4. Step 4: Simplify right side
   139,782.06x = 15,305,015,684.65
5. Step 5: Solve for x
   x = 15,305,015,684.65/139,782.06
6. Step 6: Final answer
   x = 109,491.99