Finding the Fourth Proportional to 93,404.72, 128,917.68 and 57,112.37

Step by Step Solution

1. Step 1: Write the proportion equation
   93,404.72 : 128,917.68 = 57,112.37 : x
2. Step 2: Convert to fraction form
   93,404.72/128,917.68 = 57,112.37/x
3. Step 3: Cross multiply
   93,404.72x = 128,917.68 × 57,112.37
4. Step 4: Simplify right side
   93,404.72x = 7,362,793,595.11
5. Step 5: Solve for x
   x = 7,362,793,595.11/93,404.72
6. Step 6: Final answer
   x = 78,826.79