Finding the Fourth Proportional to 72,447.39, 108,671.85 and 19,856.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,447.39 : 108,671.85 = 19,856.88 : x
2. Step 2: Convert to fraction form
   72,447.39/108,671.85 = 19,856.88/x
3. Step 3: Cross multiply
   72,447.39x = 108,671.85 × 19,856.88
4. Step 4: Simplify right side
   72,447.39x = 2,157,883,884.83
5. Step 5: Solve for x
   x = 2,157,883,884.83/72,447.39
6. Step 6: Final answer
   x = 29,785.53