Finding the Fourth Proportional to 81,328.59, 122,179.79 and 57,694.81

Step by Step Solution

1. Step 1: Write the proportion equation
   81,328.59 : 122,179.79 = 57,694.81 : x
2. Step 2: Convert to fraction form
   81,328.59/122,179.79 = 57,694.81/x
3. Step 3: Cross multiply
   81,328.59x = 122,179.79 × 57,694.81
4. Step 4: Simplify right side
   81,328.59x = 7,049,139,769.89
5. Step 5: Solve for x
   x = 7,049,139,769.89/81,328.59
6. Step 6: Final answer
   x = 86,674.81