Finding the Fourth Proportional to 89,039.68, 122,880.72 and 51,316.48

Step by Step Solution

1. Step 1: Write the proportion equation
   89,039.68 : 122,880.72 = 51,316.48 : x
2. Step 2: Convert to fraction form
   89,039.68/122,880.72 = 51,316.48/x
3. Step 3: Cross multiply
   89,039.68x = 122,880.72 × 51,316.48
4. Step 4: Simplify right side
   89,039.68x = 6,305,806,010.27
5. Step 5: Solve for x
   x = 6,305,806,010.27/89,039.68
6. Step 6: Final answer
   x = 70,820.18