Finding the Fourth Proportional to 64,196.07, 88,614.90 and 57,469.65

Step by Step Solution

1. Step 1: Write the proportion equation
   64,196.07 : 88,614.90 = 57,469.65 : x
2. Step 2: Convert to fraction form
   64,196.07/88,614.90 = 57,469.65/x
3. Step 3: Cross multiply
   64,196.07x = 88,614.90 × 57,469.65
4. Step 4: Simplify right side
   64,196.07x = 5,092,667,287.79
5. Step 5: Solve for x
   x = 5,092,667,287.79/64,196.07
6. Step 6: Final answer
   x = 79,329.89