Finding the Fourth Proportional to 70,664.76, 105,766.43 and 51,939.86

Step by Step Solution

1. Step 1: Write the proportion equation
   70,664.76 : 105,766.43 = 51,939.86 : x
2. Step 2: Convert to fraction form
   70,664.76/105,766.43 = 51,939.86/x
3. Step 3: Cross multiply
   70,664.76x = 105,766.43 × 51,939.86
4. Step 4: Simplify right side
   70,664.76x = 5,493,492,778.37
5. Step 5: Solve for x
   x = 5,493,492,778.37/70,664.76
6. Step 6: Final answer
   x = 77,740.20