Finding the Fourth Proportional to 64,015.43, 88,382.91 and 57,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,015.43 : 88,382.91 = 57,289.50 : x
2. Step 2: Convert to fraction form
   64,015.43/88,382.91 = 57,289.50/x
3. Step 3: Cross multiply
   64,015.43x = 88,382.91 × 57,289.50
4. Step 4: Simplify right side
   64,015.43x = 5,063,412,722.45
5. Step 5: Solve for x
   x = 5,063,412,722.45/64,015.43
6. Step 6: Final answer
   x = 79,096.75