Finding the Fourth Proportional to 67,219.40, 100,861.74 and 42,271.20

Step by Step Solution

1. Step 1: Write the proportion equation
   67,219.40 : 100,861.74 = 42,271.20 : x
2. Step 2: Convert to fraction form
   67,219.40/100,861.74 = 42,271.20/x
3. Step 3: Cross multiply
   67,219.40x = 100,861.74 × 42,271.20
4. Step 4: Simplify right side
   67,219.40x = 4,263,546,783.89
5. Step 5: Solve for x
   x = 4,263,546,783.89/67,219.40
6. Step 6: Final answer
   x = 63,427.32