Finding the Fourth Proportional to 72,152.98, 99,570.81 and 40,321.87

Step by Step Solution

1. Step 1: Write the proportion equation
   72,152.98 : 99,570.81 = 40,321.87 : x
2. Step 2: Convert to fraction form
   72,152.98/99,570.81 = 40,321.87/x
3. Step 3: Cross multiply
   72,152.98x = 99,570.81 × 40,321.87
4. Step 4: Simplify right side
   72,152.98x = 4,014,880,758.76
5. Step 5: Solve for x
   x = 4,014,880,758.76/72,152.98
6. Step 6: Final answer
   x = 55,644.01