Finding the Fourth Proportional to 72,433, 99,957.90 and 42,239.26

Step by Step Solution

1. Step 1: Write the proportion equation
   72,433 : 99,957.90 = 42,239.26 : x
2. Step 2: Convert to fraction form
   72,433/99,957.90 = 42,239.26/x
3. Step 3: Cross multiply
   72,433x = 99,957.90 × 42,239.26
4. Step 4: Simplify right side
   72,433x = 4,222,147,727.15
5. Step 5: Solve for x
   x = 4,222,147,727.15/72,433
6. Step 6: Final answer
   x = 58,290.39