Finding the Fourth Proportional to 72,301.87, 99,776.56 and 40,470.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,301.87 : 99,776.56 = 40,470.78 : x
2. Step 2: Convert to fraction form
   72,301.87/99,776.56 = 40,470.78/x
3. Step 3: Cross multiply
   72,301.87x = 99,776.56 × 40,470.78
4. Step 4: Simplify right side
   72,301.87x = 4,038,035,208.92
5. Step 5: Solve for x
   x = 4,038,035,208.92/72,301.87
6. Step 6: Final answer
   x = 55,849.66