Finding the Fourth Proportional to 72,447.21, 99,983.70 and 42,230.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,447.21 : 99,983.70 = 42,230.16 : x
2. Step 2: Convert to fraction form
   72,447.21/99,983.70 = 42,230.16/x
3. Step 3: Cross multiply
   72,447.21x = 99,983.70 × 42,230.16
4. Step 4: Simplify right side
   72,447.21x = 4,222,327,648.39
5. Step 5: Solve for x
   x = 4,222,327,648.39/72,447.21
6. Step 6: Final answer
   x = 58,281.44