Finding the Fourth Proportional to 71,976.83, 99,328.16 and 40,147.77

Step by Step Solution

1. Step 1: Write the proportion equation
   71,976.83 : 99,328.16 = 40,147.77 : x
2. Step 2: Convert to fraction form
   71,976.83/99,328.16 = 40,147.77/x
3. Step 3: Cross multiply
   71,976.83x = 99,328.16 × 40,147.77
4. Step 4: Simplify right side
   71,976.83x = 3,987,803,921.46
5. Step 5: Solve for x
   x = 3,987,803,921.46/71,976.83
6. Step 6: Final answer
   x = 55,404.00