Finding the Fourth Proportional to 89,436, 123,421.92 and 49,692

Step by Step Solution

1. Step 1: Write the proportion equation
   89,436 : 123,421.92 = 49,692 : x
2. Step 2: Convert to fraction form
   89,436/123,421.92 = 49,692/x
3. Step 3: Cross multiply
   89,436x = 123,421.92 × 49,692
4. Step 4: Simplify right side
   89,436x = 6,133,082,048.64
5. Step 5: Solve for x
   x = 6,133,082,048.64/89,436
6. Step 6: Final answer
   x = 68,575.09