Finding the Fourth Proportional to 139,502.59, 192,528.61 and 79,066.74

Step by Step Solution

1. Step 1: Write the proportion equation
   139,502.59 : 192,528.61 = 79,066.74 : x
2. Step 2: Convert to fraction form
   139,502.59/192,528.61 = 79,066.74/x
3. Step 3: Cross multiply
   139,502.59x = 192,528.61 × 79,066.74
4. Step 4: Simplify right side
   139,502.59x = 15,222,608,191.45
5. Step 5: Solve for x
   x = 15,222,608,191.45/139,502.59
6. Step 6: Final answer
   x = 109,120.61