Finding the Fourth Proportional to 93,196.68, 128,621.70 and 57,379.56

Step by Step Solution

1. Step 1: Write the proportion equation
   93,196.68 : 128,621.70 = 57,379.56 : x
2. Step 2: Convert to fraction form
   93,196.68/128,621.70 = 57,379.56/x
3. Step 3: Cross multiply
   93,196.68x = 128,621.70 × 57,379.56
4. Step 4: Simplify right side
   93,196.68x = 7,380,256,552.45
5. Step 5: Solve for x
   x = 7,380,256,552.45/93,196.68
6. Step 6: Final answer
   x = 79,190.12