Finding the Fourth Proportional to 72,591.76, 108,877.72 and 19,993.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,591.76 : 108,877.72 = 19,993.68 : x
2. Step 2: Convert to fraction form
   72,591.76/108,877.72 = 19,993.68/x
3. Step 3: Cross multiply
   72,591.76x = 108,877.72 × 19,993.68
4. Step 4: Simplify right side
   72,591.76x = 2,176,866,292.81
5. Step 5: Solve for x
   x = 2,176,866,292.81/72,591.76
6. Step 6: Final answer
   x = 29,987.79