Finding the Fourth Proportional to 72,081.12, 108,106.56 and 19,478.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,081.12 : 108,106.56 = 19,478.24 : x
2. Step 2: Convert to fraction form
   72,081.12/108,106.56 = 19,478.24/x
3. Step 3: Cross multiply
   72,081.12x = 108,106.56 × 19,478.24
4. Step 4: Simplify right side
   72,081.12x = 2,105,725,521.25
5. Step 5: Solve for x
   x = 2,105,725,521.25/72,081.12
6. Step 6: Final answer
   x = 29,213.27