Finding the Fourth Proportional to 72,839.32, 100,503 and 42,618.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,839.32 : 100,503 = 42,618.83 : x
2. Step 2: Convert to fraction form
   72,839.32/100,503 = 42,618.83/x
3. Step 3: Cross multiply
   72,839.32x = 100,503 × 42,618.83
4. Step 4: Simplify right side
   72,839.32x = 4,283,319,768.98
5. Step 5: Solve for x
   x = 4,283,319,768.98/72,839.32
6. Step 6: Final answer
   x = 58,805.05