Finding the Fourth Proportional to 57,005.37, 78,689.61 and 51,026.69

Step by Step Solution

1. Step 1: Write the proportion equation
   57,005.37 : 78,689.61 = 51,026.69 : x
2. Step 2: Convert to fraction form
   57,005.37/78,689.61 = 51,026.69/x
3. Step 3: Cross multiply
   57,005.37x = 78,689.61 × 51,026.69
4. Step 4: Simplify right side
   57,005.37x = 4,015,270,532.41
5. Step 5: Solve for x
   x = 4,015,270,532.41/57,005.37
6. Step 6: Final answer
   x = 70,436.71