Finding the Fourth Proportional to 89,421.28, 123,404.40 and 49,136.49

Step by Step Solution

1. Step 1: Write the proportion equation
   89,421.28 : 123,404.40 = 49,136.49 : x
2. Step 2: Convert to fraction form
   89,421.28/123,404.40 = 49,136.49/x
3. Step 3: Cross multiply
   89,421.28x = 123,404.40 × 49,136.49
4. Step 4: Simplify right side
   89,421.28x = 6,063,659,066.56
5. Step 5: Solve for x
   x = 6,063,659,066.56/89,421.28
6. Step 6: Final answer
   x = 67,810.03