Finding the Fourth Proportional to 72,196.56, 99,644.16 and 43,521.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,196.56 : 99,644.16 = 43,521.36 : x
2. Step 2: Convert to fraction form
   72,196.56/99,644.16 = 43,521.36/x
3. Step 3: Cross multiply
   72,196.56x = 99,644.16 × 43,521.36
4. Step 4: Simplify right side
   72,196.56x = 4,336,649,359.26
5. Step 5: Solve for x
   x = 4,336,649,359.26/72,196.56
6. Step 6: Final answer
   x = 60,067.26