Finding the Fourth Proportional to 79,234.15, 109,294.55 and 64,719.42

Step by Step Solution

1. Step 1: Write the proportion equation
   79,234.15 : 109,294.55 = 64,719.42 : x
2. Step 2: Convert to fraction form
   79,234.15/109,294.55 = 64,719.42/x
3. Step 3: Cross multiply
   79,234.15x = 109,294.55 × 64,719.42
4. Step 4: Simplify right side
   79,234.15x = 7,073,479,804.26
5. Step 5: Solve for x
   x = 7,073,479,804.26/79,234.15
6. Step 6: Final answer
   x = 89,273.12