Finding the Fourth Proportional to 67,379.40, 101,152.30 and 42,419.40

Step by Step Solution

1. Step 1: Write the proportion equation
   67,379.40 : 101,152.30 = 42,419.40 : x
2. Step 2: Convert to fraction form
   67,379.40/101,152.30 = 42,419.40/x
3. Step 3: Cross multiply
   67,379.40x = 101,152.30 × 42,419.40
4. Step 4: Simplify right side
   67,379.40x = 4,290,819,874.62
5. Step 5: Solve for x
   x = 4,290,819,874.62/67,379.40
6. Step 6: Final answer
   x = 63,681.48