Finding the Fourth Proportional to 89,421.69, 123,404.96 and 49,136.89

Step by Step Solution

1. Step 1: Write the proportion equation
   89,421.69 : 123,404.96 = 49,136.89 : x
2. Step 2: Convert to fraction form
   89,421.69/123,404.96 = 49,136.89/x
3. Step 3: Cross multiply
   89,421.69x = 123,404.96 × 49,136.89
4. Step 4: Simplify right side
   89,421.69x = 6,063,736,007.80
5. Step 5: Solve for x
   x = 6,063,736,007.80/89,421.69
6. Step 6: Final answer
   x = 67,810.58