Finding the Fourth Proportional to 139,276.43, 192,199.61 and 78,845.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,276.43 : 192,199.61 = 78,845.52 : x
2. Step 2: Convert to fraction form
   139,276.43/192,199.61 = 78,845.52/x
3. Step 3: Cross multiply
   139,276.43x = 192,199.61 × 78,845.52
4. Step 4: Simplify right side
   139,276.43x = 15,154,077,800.02
5. Step 5: Solve for x
   x = 15,154,077,800.02/139,276.43
6. Step 6: Final answer
   x = 108,805.76