Finding the Fourth Proportional to 139,416.84, 192,394.71 and 78,987.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,416.84 : 192,394.71 = 78,987.24 : x
2. Step 2: Convert to fraction form
   139,416.84/192,394.71 = 78,987.24/x
3. Step 3: Cross multiply
   139,416.84x = 192,394.71 × 78,987.24
4. Step 4: Simplify right side
   139,416.84x = 15,196,727,133.50
5. Step 5: Solve for x
   x = 15,196,727,133.50/139,416.84
6. Step 6: Final answer
   x = 109,002.09