Finding the Fourth Proportional to 72,123.60, 108,185.43 and 19,533.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,123.60 : 108,185.43 = 19,533.12 : x
2. Step 2: Convert to fraction form
   72,123.60/108,185.43 = 19,533.12/x
3. Step 3: Cross multiply
   72,123.60x = 108,185.43 × 19,533.12
4. Step 4: Simplify right side
   72,123.60x = 2,113,198,986.44
5. Step 5: Solve for x
   x = 2,113,198,986.44/72,123.60
6. Step 6: Final answer
   x = 29,299.69