Finding the Fourth Proportional to 72,699.37, 109,054.24 and 19,391.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,699.37 : 109,054.24 = 19,391.05 : x
2. Step 2: Convert to fraction form
   72,699.37/109,054.24 = 19,391.05/x
3. Step 3: Cross multiply
   72,699.37x = 109,054.24 × 19,391.05
4. Step 4: Simplify right side
   72,699.37x = 2,114,675,947.92
5. Step 5: Solve for x
   x = 2,114,675,947.92/72,699.37
6. Step 6: Final answer
   x = 29,087.95