Finding the Fourth Proportional to 139,508.61, 192,536.94 and 79,072.79

Step by Step Solution

1. Step 1: Write the proportion equation
   139,508.61 : 192,536.94 = 79,072.79 : x
2. Step 2: Convert to fraction form
   139,508.61/192,536.94 = 79,072.79/x
3. Step 3: Cross multiply
   139,508.61x = 192,536.94 × 79,072.79
4. Step 4: Simplify right side
   139,508.61x = 15,224,432,061.18
5. Step 5: Solve for x
   x = 15,224,432,061.18/139,508.61
6. Step 6: Final answer
   x = 109,128.98