Finding the Fourth Proportional to 72,321.01, 99,812.97 and 43,642.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,321.01 : 99,812.97 = 43,642.15 : x
2. Step 2: Convert to fraction form
   72,321.01/99,812.97 = 43,642.15/x
3. Step 3: Cross multiply
   72,321.01x = 99,812.97 × 43,642.15
4. Step 4: Simplify right side
   72,321.01x = 4,356,052,608.69
5. Step 5: Solve for x
   x = 4,356,052,608.69/72,321.01
6. Step 6: Final answer
   x = 60,232.19