Finding the Fourth Proportional to 72,250.81, 108,407.35 and 30,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,250.81 : 108,407.35 = 30,139.18 : x
2. Step 2: Convert to fraction form
   72,250.81/108,407.35 = 30,139.18/x
3. Step 3: Cross multiply
   72,250.81x = 108,407.35 × 30,139.18
4. Step 4: Simplify right side
   72,250.81x = 3,267,308,841.89
5. Step 5: Solve for x
   x = 3,267,308,841.89/72,250.81
6. Step 6: Final answer
   x = 45,221.76