Finding the Fourth Proportional to 72,151.94, 99,566.34 and 40,320.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,151.94 : 99,566.34 = 40,320.56 : x
2. Step 2: Convert to fraction form
   72,151.94/99,566.34 = 40,320.56/x
3. Step 3: Cross multiply
   72,151.94x = 99,566.34 × 40,320.56
4. Step 4: Simplify right side
   72,151.94x = 4,014,570,585.95
5. Step 5: Solve for x
   x = 4,014,570,585.95/72,151.94
6. Step 6: Final answer
   x = 55,640.51