Finding the Fourth Proportional to 139,449.01, 192,435.64 and 79,039.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,449.01 : 192,435.64 = 79,039.18 : x
2. Step 2: Convert to fraction form
   139,449.01/192,435.64 = 79,039.18/x
3. Step 3: Cross multiply
   139,449.01x = 192,435.64 × 79,039.18
4. Step 4: Simplify right side
   139,449.01x = 15,209,955,188.38
5. Step 5: Solve for x
   x = 15,209,955,188.38/139,449.01
6. Step 6: Final answer
   x = 109,071.80