Finding the Fourth Proportional to 72,434, 99,959.28 and 42,240.26

Step by Step Solution

1. Step 1: Write the proportion equation
   72,434 : 99,959.28 = 42,240.26 : x
2. Step 2: Convert to fraction form
   72,434/99,959.28 = 42,240.26/x
3. Step 3: Cross multiply
   72,434x = 99,959.28 × 42,240.26
4. Step 4: Simplify right side
   72,434x = 4,222,305,976.61
5. Step 5: Solve for x
   x = 4,222,305,976.61/72,434
6. Step 6: Final answer
   x = 58,291.77