Finding the Fourth Proportional to 72,823.50, 109,170.24 and 28,439.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,823.50 : 109,170.24 = 28,439.88 : x
2. Step 2: Convert to fraction form
   72,823.50/109,170.24 = 28,439.88/x
3. Step 3: Cross multiply
   72,823.50x = 109,170.24 × 28,439.88
4. Step 4: Simplify right side
   72,823.50x = 3,104,788,525.17
5. Step 5: Solve for x
   x = 3,104,788,525.17/72,823.50
6. Step 6: Final answer
   x = 42,634.43