Finding the Fourth Proportional to 72,105.76, 108,158.16 and 19,515.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,105.76 : 108,158.16 = 19,515.04 : x
2. Step 2: Convert to fraction form
   72,105.76/108,158.16 = 19,515.04/x
3. Step 3: Cross multiply
   72,105.76x = 108,158.16 × 19,515.04
4. Step 4: Simplify right side
   72,105.76x = 2,110,710,818.73
5. Step 5: Solve for x
   x = 2,110,710,818.73/72,105.76
6. Step 6: Final answer
   x = 29,272.43