Finding the Fourth Proportional to 72,564.15, 108,888.26 and 30,440.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,564.15 : 108,888.26 = 30,440.50 : x
2. Step 2: Convert to fraction form
   72,564.15/108,888.26 = 30,440.50/x
3. Step 3: Cross multiply
   72,564.15x = 108,888.26 × 30,440.50
4. Step 4: Simplify right side
   72,564.15x = 3,314,613,078.53
5. Step 5: Solve for x
   x = 3,314,613,078.53/72,564.15
6. Step 6: Final answer
   x = 45,678.38