Finding the Fourth Proportional to 72,964.78, 109,382.56 and 28,623.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,964.78 : 109,382.56 = 28,623.36 : x
2. Step 2: Convert to fraction form
   72,964.78/109,382.56 = 28,623.36/x
3. Step 3: Cross multiply
   72,964.78x = 109,382.56 × 28,623.36
4. Step 4: Simplify right side
   72,964.78x = 3,130,896,392.60
5. Step 5: Solve for x
   x = 3,130,896,392.60/72,964.78
6. Step 6: Final answer
   x = 42,909.69