Finding the Fourth Proportional to 81,139.48, 111,964.32 and 46,683.28

Step by Step Solution

1. Step 1: Write the proportion equation
   81,139.48 : 111,964.32 = 46,683.28 : x
2. Step 2: Convert to fraction form
   81,139.48/111,964.32 = 46,683.28/x
3. Step 3: Cross multiply
   81,139.48x = 111,964.32 × 46,683.28
4. Step 4: Simplify right side
   81,139.48x = 5,226,861,700.57
5. Step 5: Solve for x
   x = 5,226,861,700.57/81,139.48
6. Step 6: Final answer
   x = 64,418.23