Finding the Fourth Proportional to 72,965.78, 109,384.07 and 28,624.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,965.78 : 109,384.07 = 28,624.35 : x
2. Step 2: Convert to fraction form
   72,965.78/109,384.07 = 28,624.35/x
3. Step 3: Cross multiply
   72,965.78x = 109,384.07 × 28,624.35
4. Step 4: Simplify right side
   72,965.78x = 3,131,047,760.98
5. Step 5: Solve for x
   x = 3,131,047,760.98/72,965.78
6. Step 6: Final answer
   x = 42,911.18