Finding the Fourth Proportional to 72,782.72, 109,101.20 and 30,672.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,782.72 : 109,101.20 = 30,672.96 : x
2. Step 2: Convert to fraction form
   72,782.72/109,101.20 = 30,672.96/x
3. Step 3: Cross multiply
   72,782.72x = 109,101.20 × 30,672.96
4. Step 4: Simplify right side
   72,782.72x = 3,346,456,743.55
5. Step 5: Solve for x
   x = 3,346,456,743.55/72,782.72
6. Step 6: Final answer
   x = 45,978.73