Finding the Fourth Proportional to 79,321.23, 109,419.12 and 49,087.31

Step by Step Solution

1. Step 1: Write the proportion equation
   79,321.23 : 109,419.12 = 49,087.31 : x
2. Step 2: Convert to fraction form
   79,321.23/109,419.12 = 49,087.31/x
3. Step 3: Cross multiply
   79,321.23x = 109,419.12 × 49,087.31
4. Step 4: Simplify right side
   79,321.23x = 5,371,089,716.27
5. Step 5: Solve for x
   x = 5,371,089,716.27/79,321.23
6. Step 6: Final answer
   x = 67,713.14