Finding the Fourth Proportional to 72,152.33, 99,570.47 and 40,321.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,152.33 : 99,570.47 = 40,321.76 : x
2. Step 2: Convert to fraction form
   72,152.33/99,570.47 = 40,321.76/x
3. Step 3: Cross multiply
   72,152.33x = 99,570.47 × 40,321.76
4. Step 4: Simplify right side
   72,152.33x = 4,014,856,594.43
5. Step 5: Solve for x
   x = 4,014,856,594.43/72,152.33
6. Step 6: Final answer
   x = 55,644.17