Finding the Fourth Proportional to 72,300.87, 99,775.18 and 40,469.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,300.87 : 99,775.18 = 40,469.78 : x
2. Step 2: Convert to fraction form
   72,300.87/99,775.18 = 40,469.78/x
3. Step 3: Cross multiply
   72,300.87x = 99,775.18 × 40,469.78
4. Step 4: Simplify right side
   72,300.87x = 4,037,879,584.06
5. Step 5: Solve for x
   x = 4,037,879,584.06/72,300.87
6. Step 6: Final answer
   x = 55,848.28