Finding the Fourth Proportional to 80,353.47, 120,531.15 and 30,420.15

Step by Step Solution

1. Step 1: Write the proportion equation
   80,353.47 : 120,531.15 = 30,420.15 : x
2. Step 2: Convert to fraction form
   80,353.47/120,531.15 = 30,420.15/x
3. Step 3: Cross multiply
   80,353.47x = 120,531.15 × 30,420.15
4. Step 4: Simplify right side
   80,353.47x = 3,666,575,662.67
5. Step 5: Solve for x
   x = 3,666,575,662.67/80,353.47
6. Step 6: Final answer
   x = 45,630.58