Finding the Fourth Proportional to 72,440.92, 99,971.06 and 42,221.37

Step by Step Solution

1. Step 1: Write the proportion equation
   72,440.92 : 99,971.06 = 42,221.37 : x
2. Step 2: Convert to fraction form
   72,440.92/99,971.06 = 42,221.37/x
3. Step 3: Cross multiply
   72,440.92x = 99,971.06 × 42,221.37
4. Step 4: Simplify right side
   72,440.92x = 4,220,914,952.49
5. Step 5: Solve for x
   x = 4,220,914,952.49/72,440.92
6. Step 6: Final answer
   x = 58,267.00