Finding the Fourth Proportional to 91,723.32, 137,379.54 and 79,723.32

Step by Step Solution

1. Step 1: Write the proportion equation
   91,723.32 : 137,379.54 = 79,723.32 : x
2. Step 2: Convert to fraction form
   91,723.32/137,379.54 = 79,723.32/x
3. Step 3: Cross multiply
   91,723.32x = 137,379.54 × 79,723.32
4. Step 4: Simplify right side
   91,723.32x = 10,952,353,028.87
5. Step 5: Solve for x
   x = 10,952,353,028.87/91,723.32
6. Step 6: Final answer
   x = 119,406.42