Finding the Fourth Proportional to 93,457.92, 128,956.73 and 55,212.15

Step by Step Solution

1. Step 1: Write the proportion equation
   93,457.92 : 128,956.73 = 55,212.15 : x
2. Step 2: Convert to fraction form
   93,457.92/128,956.73 = 55,212.15/x
3. Step 3: Cross multiply
   93,457.92x = 128,956.73 × 55,212.15
4. Step 4: Simplify right side
   93,457.92x = 7,119,978,044.21
5. Step 5: Solve for x
   x = 7,119,978,044.21/93,457.92
6. Step 6: Final answer
   x = 76,183.78