Finding the Fourth Proportional to 80,436, 120,637.28 and 30,498.88

Step by Step Solution

1. Step 1: Write the proportion equation
   80,436 : 120,637.28 = 30,498.88 : x
2. Step 2: Convert to fraction form
   80,436/120,637.28 = 30,498.88/x
3. Step 3: Cross multiply
   80,436x = 120,637.28 × 30,498.88
4. Step 4: Simplify right side
   80,436x = 3,679,301,926.25
5. Step 5: Solve for x
   x = 3,679,301,926.25/80,436
6. Step 6: Final answer
   x = 45,741.98