Finding the Fourth Proportional to 139,733.76, 192,799.80 and 79,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,733.76 : 192,799.80 = 79,290.72 : x
2. Step 2: Convert to fraction form
   139,733.76/192,799.80 = 79,290.72/x
3. Step 3: Cross multiply
   139,733.76x = 192,799.80 × 79,290.72
4. Step 4: Simplify right side
   139,733.76x = 15,287,234,957.86
5. Step 5: Solve for x
   x = 15,287,234,957.86/139,733.76
6. Step 6: Final answer
   x = 109,402.59