Finding the Fourth Proportional to 72,421.92, 99,913.36 and 42,202.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,421.92 : 99,913.36 = 42,202.72 : x
2. Step 2: Convert to fraction form
   72,421.92/99,913.36 = 42,202.72/x
3. Step 3: Cross multiply
   72,421.92x = 99,913.36 × 42,202.72
4. Step 4: Simplify right side
   72,421.92x = 4,216,615,556.34
5. Step 5: Solve for x
   x = 4,216,615,556.34/72,421.92
6. Step 6: Final answer
   x = 58,222.92