Finding the Fourth Proportional to 72,440.61, 99,944.41 and 42,219.02

Step by Step Solution

1. Step 1: Write the proportion equation
   72,440.61 : 99,944.41 = 42,219.02 : x
2. Step 2: Convert to fraction form
   72,440.61/99,944.41 = 42,219.02/x
3. Step 3: Cross multiply
   72,440.61x = 99,944.41 × 42,219.02
4. Step 4: Simplify right side
   72,440.61x = 4,219,555,044.68
5. Step 5: Solve for x
   x = 4,219,555,044.68/72,440.61
6. Step 6: Final answer
   x = 58,248.47