Finding the Fourth Proportional to 72,443, 99,971.70 and 42,249.26

Step by Step Solution

1. Step 1: Write the proportion equation
   72,443 : 99,971.70 = 42,249.26 : x
2. Step 2: Convert to fraction form
   72,443/99,971.70 = 42,249.26/x
3. Step 3: Cross multiply
   72,443x = 99,971.70 × 42,249.26
4. Step 4: Simplify right side
   72,443x = 4,223,730,345.94
5. Step 5: Solve for x
   x = 4,223,730,345.94/72,443
6. Step 6: Final answer
   x = 58,304.19