Finding the Fourth Proportional to 72,152.94, 99,567.72 and 40,321.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,152.94 : 99,567.72 = 40,321.56 : x
2. Step 2: Convert to fraction form
   72,152.94/99,567.72 = 40,321.56/x
3. Step 3: Cross multiply
   72,152.94x = 99,567.72 × 40,321.56
4. Step 4: Simplify right side
   72,152.94x = 4,014,725,796.04
5. Step 5: Solve for x
   x = 4,014,725,796.04/72,152.94
6. Step 6: Final answer
   x = 55,641.89