Finding the Fourth Proportional to 72,089.20, 99,483.24 and 40,258

Step by Step Solution

1. Step 1: Write the proportion equation
   72,089.20 : 99,483.24 = 40,258 : x
2. Step 2: Convert to fraction form
   72,089.20/99,483.24 = 40,258/x
3. Step 3: Cross multiply
   72,089.20x = 99,483.24 × 40,258
4. Step 4: Simplify right side
   72,089.20x = 4,004,996,275.92
5. Step 5: Solve for x
   x = 4,004,996,275.92/72,089.20
6. Step 6: Final answer
   x = 55,556.12