Finding the Fourth Proportional to 107,543.89, 161,315.82 and 51,213.21

Step by Step Solution

1. Step 1: Write the proportion equation
   107,543.89 : 161,315.82 = 51,213.21 : x
2. Step 2: Convert to fraction form
   107,543.89/161,315.82 = 51,213.21/x
3. Step 3: Cross multiply
   107,543.89x = 161,315.82 × 51,213.21
4. Step 4: Simplify right side
   107,543.89x = 8,261,500,361.05
5. Step 5: Solve for x
   x = 8,261,500,361.05/107,543.89
6. Step 6: Final answer
   x = 76,819.80